Monday, March 09, 2026

Listen to This Month's "Planetary Parade" with NASA's Chandra




  • Three new Chandra sonifications of data of Jupiter, Saturn, and Uranus have been released.

  • Planets and other Solar System bodies can reflect X-rays given off by the Sun, which Chandra can detect.

  • Sonification is a process that translates data captured by Chandra and other telescopes into sound.

  • In addition to X-rays from Chandra, these new sonifications contain data from Hubble, Cassini, and Keck telescopes.



In late February, people in the Northern Hemisphere can look up for a special sight: Six planets will all be visible from clear and dark night skies. New sonifications from NASA’s Chandra X-ray Observatory released Wednesday will help commemorate this latest “planetary parade.”

Because the planets in our solar system travel around the Sun in the same plane (known as the ecliptic), they will sometimes appear bunched together in the sky when their orbits find them on the same side of the Sun at the same time. When this happens, it looks like the planets have roughly formed a line from our vantage point on Earth.

In Chandra’s sonifications, which translate astronomical data into sound, three of the planets that will be on display — Jupiter, Saturn, and Uranus — can be seen and heard in ways that they cannot from Earth.

While Chandra is best known for its X-ray insight into black holes and other extreme objects, the telescope has also played an important role in the exploration of our solar system. The Sun gives off X-rays that travel out into the solar system and can be reflected by planets, moons, and other bodies. This gives astronomers a unique window into certain physics that cannot be discovered through other kinds of telescopes.

The sonification of Jupiter combines X-ray data from Chandra with an infrared image from NASA’s Hubble Space Telescope. Woodwind sounds reveal Chandra’s X-ray data, including emission from the planet’s auroras. More instruments join in to represent the planet’s complex cloud layers. Next, through the combination of an optical image from NASA’s Cassini mission and X-rays from Chandra, listeners can experience Saturn like never before. A siren-like sound follows the arc of the rings, and different tones of synthesizers play as the scan passes the planet itself. Finally, listeners can hear the ice giant Uranus through the data collected by Chandra and the W.M. Keck Observatory. The data in this sonification reflects the amount of light detected from the planet and the orientation of its ring.

The process of creating a sonification preserves the integrity of the data, which arrives on Earth as a series of ones and zeroes (binary code), and shifts it into a form that can be processed through hearing. Sonifications expand options for people to explore what telescopes discover in space, an example of NASA’s ongoing commitment to share its data as widely as possible.




Jupiter:

In this image, the amount of diffuse X-rays from a donut-shaped ring of energetic particles around Jupiter, seen on the left and right side of the planet, has been enhanced compared to the amount of X-rays from the planet's auroras, seen at the poles. As the scan moves left to right, it encounters X-rays that bracket the planet on either side, and this plays as woodwind sounds. As we pass over the planet itself, seen in an infrared image from NASA’s Hubble Space Telescope, the sounds become fuller as the infrared data is represented by other instruments. Since Jupiter is tilted slightly, the pitch descends as the scan passes over the bright band near the equator and through the Great Red Spot. On the other side, more X-ray data from Chandra flanks the planet and can be heard as gusty wind sounds at the end.


Saturn:

The scan of Saturn begins on the right and moves to the left. As it encounters Saturn’s famous rings, seen in an optical image from the Cassini mission, listeners hear a siren effect whose frequency follows the arc of the rings. Once the scan reaches the planet itself, the sounds change, to lower tones with a dark synthetic bass sound. This distinguishes the rings from the planet. Chandra’s X-rays are heard as higher synthetic tones that mark where high-energy activity is found across the planet, rings, and poles.


Uranus:

Returning to the left to right scan, the sounds begin with a cello that traces the arcing ring — not as famous as Saturn’s but still prominent — around the ice giant Uranus. The notes change to represent the amount of reflected light and its location on Uranus as seen in an optical light image from the W.M. Keck Observatory. The X-rays detected by Chandra, which come from X-rays from the Sun that are reflected, are heard as higher frequencies as the scan passes over the pinkish region of the planet. The apparent asymmetry in the X-rays may not be a real effect because of the faint signal and the smoothing that was applied to the image.

NASA's Marshall Space Flight Center in Huntsville, Alabama, manages the Chandra program. The Smithsonian Astrophysical Observatory's Chandra X-ray Center controls science operations from Cambridge, Massachusetts, and flight operations from Burlington, Massachusetts

For more on the Chandra sonification program, visit: https://chandra.si.edu/sound/





Visual Description:

This release features three sonifications, each focusing on a different planet in our solar system. The sonifications are presented as soundtracks to short videos. Each video features a composite image and an activation line. As the activation line sweeps across the image, it encounters visual elements. These elements are translated into sound, or sonified, according to parameters established by Chandra's sonification team.

The first sonification focuses on the planet Jupiter. At the center of the associated composite image is the gas giant itself; a seemingly perfect sphere with an atmosphere of latitudinal bands. The bands are different shades of grey, brown, and black, each with its own texture and width. Flanking Jupiter are neon pink and white clouds, representing X-rays from energetic particles in a ring around the planet. In the video, the activation line moves from our left to right. It first encounters a pink cloud, triggering whooshing woodwinds. When the activation line encounters Jupiter, dramatic low notes are triggered. Listen for the dip as the line passes over the Great Red Spot in Jupiter's southern hemisphere. The activation line continues toward our right, passing more pink X-ray clouds. The largest cloud, the last one encountered, has a bright white core, which translates to loud gusty woodwinds.

The second sonification focuses on the ringed planet, Saturn. In the composite image, the large gas giant fills the frame, its spherical outer layer a pale sandy grey. In this image, the wide bands of rings surrounding the planet are in shades of pale grey and sandy yellow. Here, Saturn is tilted away from us, making the round rings appear oval in shape. Dotting the planet are small pockets of neon blue. These represent reflected X-ray light observed by Chandra. In this video, the activation line moves from our right to left. When the line passes over the rings, a whooshing sounds spreads, conveying the widening middle of the oval shapes. Pockets of neon blue X-ray light trigger synthesizer sounds, with the pitch mapped to each pocket's vertical position in the image. When the line sweeps across Saturn's large round body, a low rumbling synth tone is triggered. The volume is linked to brightness, such that the low tone fades when the line reaches the shady side of the planet, on our left.
The third sonification features the planet Uranus. In the composite image, the icy giant is a greenish-blue cyan color, with a blush of neon pink X-rays hovering over its core. Uranus has a collection of very narrow rings, much finer than the wide disk-like rings surrounding Saturn. In this image, the fine rings are near vertical and slightly tilted, creating an oval shape with rounded points at our lower left and upper right. In this sonification, the activation line moves from our left to right. Brightness is mapped to volume and height is mapped to pitch, such that brighter objects at the top of the image sound louder and higher. Here, the curved oval shape of the rings is conveyed as a swooping cello note, with the pitch sliding up as the activation line passes the oval tilted toward our upper right.



Fast Facts for: Jupiter:

Credit: X-ray: NASA/CXC/SAO; Infrared: NASA/ESA/CSA/STScI; Image Processing: NASA/CXC/SAO/J. Major, S. Wolk; Sonification: NASA/CXC/SAO/K.Arcand, SYSTEM Sounds (M. Russo, A. Santaguida)
Release Date: February 25, 2026
Scale: Image is about 37 arcseconds across (Jupiter's diameter is 86,900 miles) as viewed from Earth.
Category: Solar System
Observation Date(s): Dec 18, 2000
Observation Time: 9 hours 57 minutes
Obs. IDs: 18929, 20108-20110
Instrument: ACIS
References: Elsner, R.F., et al, 2002, ApJ, 572, 1077; DOI 10.1086/340434
Color Code: X-ray: purple; Infrared: red, green, and blue
Distance Estimate: About 383 million miles from Earth (at the start of Chandra observations)



Fast Facts for: Saturn:

Credit: X-ray: NASA/MSFC/CXC/A.Bhardwaj et al.; Optical: NASA/JPL-Caltech/SSI; Sonification: NASA/CXC/SAO/K.Arcand, SYSTEM Sounds (M. Russo, A. Santaguida)
Release Date: February 25, 2026
Scale: At the time of this observation, the angular diameter of the disk of Saturn was 20.5 arcsec.
Category: Solar System
Observation Date(s): April 14, 2003; January 20, 2004; January 26, 2004
Observation Time: 30 hours (1 day 6 hours)
Obs. IDs: 3725, 4466, 4467
Instrument: ACIS
References: A. Bhardwaj et al. The Astrophysical Journal, 627:L73, 2005 July 1 also astro-ph
Color Code: X-ray (Energy): blue; Optical: red, green, and blue
Distance Estimate: An average distance of 886 million miles (1.4 billion kilometers) from Earth.



Fast Facts for Uranus:

Credit: X-ray: NASA/CXO/University College London/W. Dunn et al; Optical: W.M. Keck Observatory; Sonification; NASA/CXC/SAO/K.Arcand, SYSTEM Sounds (M. Russo, A. Santaguida), Cello by Johnny Mok
Release Date: February 25, 2026
Scale: At the time of this observation, the angular diameter of the disk of Saturn was 20.5 arcsec.
Category: Solar System
Observation Date(s): August 7, 2002
Observation Time: 8 hours 13 minutes
Obs. IDs: 2518
Instrument: ACIS
References: Dunn, W. et al. 2021, JGR (accepted)
Color Code: X-ray (Energy): blue; Optical: red, green, and blue
Distance Estimate: An average distance of 1.8 billion miles (2.9 billion kilometers) from Earth.


Sunday, March 08, 2026

Intermediate Spiral Galaxy NGC 941


NGC 941 is located approximately 55 million light-years away in the constellation Cetus. This faint galaxy is classified as an intermediate spiral, exhibiting characteristics between a barred spiral with a central bar and an unbarred spiral. Overall, NGC 941 has a bluish appearance, and the presence of dust lanes in its central region indicates ongoing star formation. The small orange galaxies visible around it are actually much more distant background galaxies, seen through NGC 941 due to its low surface brightness. Credit: NAOJ; Image provided by Masayuki Tanaka



NuSTAR Observes a Bursting Neutron Star

Artist's impression of the neutron star GS 1826–24, accreting material from its neighbor in a disk, and undergoing a bright thermonuclear burst that sends a flash through the system, illuminating its different components. Image credit: Futselaar (artsource) / Degenaar. Download Image

During the past week, NuSTAR targeted the X-ray binary GS 1826–24 in coordinated observations with the Karl G. Jansky Very Large Array (VLA) radio telescope, aiming to directly measure the speed of a jet launched by an accreting neutron star. This source recently entered an extraordinary state of rapid, clocklike thermonuclear bursts ignited on the neutron star surface. This produces a series of predictable, high-contrast, X-ray flashes that perturb the inner accretion flow and the associated jet of the neutron star binary system. NuSTAR precisely measures the burst onset and energetics, as well as the dynamical response of the inner accretion flow, while the VLA simultaneously tracks the compact radio jet. By measuring the lag between the X-ray burst and the jet’s radio response, the jet propagation speed can be directly determined — applying a novel burst-timing technique that was recently first demonstrated by the same team to measure the speed of the compact jet of the accreting neutron star 4U 1728−34 . At the same time, NuSTAR’s broadband X-ray coverage tracks how different components of the accretion flow — such as the boundary layer, corona, and inner disk — respond to each burst. This approach tests fundamental predictions for how relativistic jets are launched and powered in accreting compact objects.

Author: Nathalie Degenaar (Associate Professor, University of Amsterdam)



Saturday, March 07, 2026

Astronomers Hate Them! This Star Formation Ingredient Makes Clusters Look 300 Million Years Older

This Hubble Space Telescope shows one of the most massive young star clusters in the Milky Way, nestled within the nebula NGC 3603. Credit: NASA, ESA, and the Hubble Heritage Team

Title: Characterizing The Star Cluster Populations in Stephan’s Quintet Using HST and JWST Observations
Authors: P. Aromal et al.
First Author’s Institution: University of Western Ontario
Status: Published in ApJ

This Hubble Space Telescope shows one of the most massive young star On 12 July 2022, the first images taken with JWST were released to the public. All of the astronomers in my department gathered together to watch the images be revealed in real time. It was exciting for everyone, from graduate students getting to see a glimpse into the future possibilities of their fields, to retired professors getting to see the fruits of their decades-long labor in advocating for the telescope to be built

One image that was showcased was of Stephan’s Quintet (Figure 1), an actively interacting galaxy group. We were all immediately impressed by the clarity of the star-forming regions in the dense gas between the galaxies in the image. Now, more than three years later, the authors of today’s article lay out a comprehensive study of the star clusters in those same regions, taking advantage of JWST’s multi-wavelength imaging capabilities.

Figure 1: The JWST imaging of Stephan’s Quintet with member galaxies labeled (including NGC 7320C, which is outside of the field of view). Gray arrows indicate the direction the associated galaxy is moving. The inlaid image shows the distribution of young star clusters in relation to the six main tidal features in the group. Inset image: Adapted from Aromal et al. 2025; Background image: NASA, ESA, CSA, STScI

HST + JWST = OMG!

While JWST’s depth and resolution are exciting for those studying high-redshift galaxies, for local-universe astronomers JWST really shines when used in combination with the Hubble Space Telescope (HST). The star clusters in Stephan’s Quintet were already cataloged in 2015 using HST, but the filters used in the imaging only captured optical and very-near-infrared wavelengths. If you want to get enough data to be able to accurately estimate the ages of these star clusters, especially accounting for reddening caused by surrounding dust, you need to push your imaging further into the infrared.

Unlike HST, JWST can take images in two wavelength filters at once, meaning you can get more data with roughly the same observing time. Here the authors imaged the same star clusters that HST looked at with five new JWST filters, all at longer infrared wavelengths than HST. Together, the authors had flux measurements at 10 different wavelengths across the optical and infrared spectrum for each star cluster, meaning they could perform spectral energy distribution fitting.

Go Ahead, Guess My Age

The best way to estimate an unresolved star cluster’s age is to get its full spectrum of light and fit spectroscopic models with varying ages to it until the model matches the observations. But, if you have individual brightness measurements at many different, spread-out wavelengths, you can still fit spectral models to the measurements and make a best guess despite the gaps in your full spectrum. Here the authors compare their multi-wavelength data to Code Investigating GALaxy Emission (CIGALE) spectral energy distribution models, allowing both the cluster ages and amount of dust extinction to vary.

This is where the long-wavelength JWST imaging is most necessary, because it is sometimes difficult to determine a cluster’s age with this method. For instance, is the light a cluster is giving off mostly red because its stars are very old, or is it because its stars are actually bluer and younger and the cluster just appears red due to foreground dust?

Infrared imaging can “see through” any dust and break this age–extinction degeneracy. For most of the clusters, the authors found that the original HST-only age estimates were accurate, but for 121 clusters in the sample (about 8% of the total), the JWST imaging made a significant change in the age estimates, shifting them to younger ages.

Where Do the Hip, Young Star Clusters Hang Out?

Once the authors had their updated ages for the clusters, they then mapped out where the clusters were located in Stephan’s Quintet and how hese clusters traced the known tidal structures in the group. Tidal structures are structures, usually consisting of gas, dust, and stars, that are formed from the tidal forces galaxies exert on one another as they interact and merge. The authors found that throughout all tidal regions of Stephan’s Quintet, there were many young, low-mass star clusters, all about 3–5 million years old. This timescale lines up with previous studies’ estimates of when NGC 7318B was thought to first fall into Stephan’s Quintet, compressing the gas in the group and creating tidal shocks that would trigger star formation.

Additionally, the authors’ star cluster age distribution for the group (see Figure 2) has a second, broader peak of higher-mass clusters with ages around 200 million years. This would correspond to when the most recent encounter between NGC 7320C (which has now passed through the group and is out of frame in Figure 1) and NGC 7319 is estimated to have occurred.

Figure 2: A histogram of the ages of all the star clusters in Stephan’s Quintet. The blue dashed line shows the estimates using only the HST data, and the orange solid line shows the estimates using both HST and JWST together. Notice how a lot of the clusters around 108 years old turned out to be less than 107 years old. Adapted from Aromal et al. 2025

Going even older, they found that the star clusters in the group that are more than 1 billion years old are also the most massive, and they are predominantly concentrated around NGC 7318A. This is the most massive elliptical galaxy in the group, and it’s the most likely to have a rich, old star cluster population, formed prior to any tidal interactions.

Taken together, the updated age measurements of the star clusters in Stephan’s Quintet provide not only a study of star formation history, but also of the galaxy–galaxy interaction history in the system!

Looking Ahead

While the authors have improved the age estimates of the clusters in Stephan’s Quintet, there are still limitations to their analysis. Their estimated star formation rate for the group is much lower than that estimated with other tracers, such as H-alpha emission, meaning this study may still be missing a fraction of very young star clusters. The most likely culprits are embedded clusters that haven’t had enough time to expel the surrounding gas from the massive clouds they formed within.

Future work will attempt to identify these embedded clusters using near-infrared JWST imaging, since in this study the authors focused only on the previously HST-identified clusters. In addition, combining their JWST data with high-resolution radio observations taken with the Atacama Large Millimeter/submillimeter Array will allow them to study the gas in the group more closely and understand how it influences the star formation.

This work highlights JWST’s excellent application to star cluster observations, building on the data we already have from decades of HST se, and it looks like we’re only just getting started!

Original astrobite edited by Skylar Grayson.




About the author, Veronika Dornan:

Veronika is a postdoctoral research associate at the University of Edinburgh. Her research is in observations of globular star clusters and how they can be used to study the evolution of their host galaxies.



Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we occasionally repost astrobites content here at AAS Nova. We hope you enjoy this post from astrobites; the original can be viewed at astrobites.org.


Friday, March 06, 2026

Core Survey by NASA’s Roman Mission Will Unveil Universe’s Dark Side

This infographic describes the High-Latitude Wide-Area Survey that will be conducted by NASA’s Nancy Grace Roman Space Telescope. This observation program will cover more than 5,000 square degrees (about 12 percent of the sky) in just under a year and a half. Scientists will use the survey to analyze hundreds of millions of galaxies scattered across the cosmos that reveal clues about the universe’s shadowy underpinnings — dark matter and dark energy — as well as a wealth of other science topics. Credit: NASA’s Goddard Space Flight Center

This simulation shows the type of science astronomers will be able to do with future observations from NASA’s Nancy Grace Roman Space Telescope. The sequence demonstrates how the gravity of intervening galaxy clusters and dark matter can distort the light from farther objects, warping their appearance. More intervening material creates stronger distortions. By analyzing these features, astronomers can study elusive dark matter, which can only be measured indirectly through its gravitational effects on visible matter. As a bonus, the distortion acts like a telescope, enabling observations of extremely distant galaxies. Simulations like this one help astronomers understand what Roman’s future observations could tell us about the universe, and provide useful data to validate data analysis techniques. Caltech/IPAC/R. Hurt

This animation illustrates how small particles (in this case, sand) behave when exposed to different sound frequencies. In the very early universe, a cosmic “hum” created ripples in the primordial soup that filled space. Since the ripples were places where more matter was collected, like the rings of sand shown here, slightly more galaxies formed along them than elsewhere. As the universe expanded over billions of years, so did these structures. By comparing their size during different cosmic epochs, astronomers can trace the universe’s expansion. Nigel Stanford (used with permission)



The broadest planned survey by NASA’s upcoming Nancy Grace Roman Space Telescope will reveal hundreds of millions of galaxies scattered across the cosmos. After Roman launches as soon as this fall, scientists will use these sparkly beacons to study the universe’s shadowy underpinnings: dark matter and dark energy.

“We set out to build the ultimate wide-area infrared survey, and I think we accomplished that,” said Ryan Hickox, a professor at Dartmouth College in Hanover, New Hampshire, and co-chair of the committee that shaped the survey’s design. “We’ll use Roman’s enormous, deep 3D images to explore the fundamental nature of the universe, including its dark side.”

Roman’s High-Latitude Wide-Area Survey is one of the mission’s three core observation programs. It will cover more than 5,000 square degrees (about 12 percent of the sky) in just under a year and a half. Roman will look far from the dusty plane of our Milky Way galaxy (that’s what the “high-latitude” part of the survey name means), looking up and out of the galaxy rather than through it to get the clearest view of the distant cosmos.

“This survey is going to be a spectacular map of the cosmos, the first time we have Hubble-quality imaging over a large area of the sky,” said David Weinberg, an astronomy professor at Ohio State University in Columbus, who played a major role in devising the survey. “Even a single pointing with Roman needs a whole wall of 4K televisions to display at full resolution. Displaying the whole high-latitude survey at once would take half a million 4K TVs, enough to cover 200 football fields or the cliff face of El Capitan.”

The survey will combine the powers of imaging and spectroscopy to unveil a goldmine of galaxies strewn across cosmic time. Astronomers will use the survey’s data to explore invisible dark matter, detectable only via its gravitational effects on other objects, and the nature of dark energy — a pressure that seems to be speeding up the universe’s expansion.

“Cosmic acceleration is the biggest mystery in cosmology and maybe in all of physics,” Weinberg said. “Somehow, when we get to scales of billions of light years, gravity pushes rather than pulls. The Roman wide area survey will provide critical new clues to help us solve this mystery, because it allows us to measure the history of cosmic structure and the early expansion rate much more accurately than we can today.”

Weighing shadows

Anything that has mass warps space-time, the underlying fabric of the universe. Extremely massive things like clusters of galaxies warp space-time so much that they distort the appearance of background objects — a phenomenon called gravitational lensing.

“It’s like looking through a cosmic funhouse mirror,” Hickox said. “It can smear or duplicate distant galaxies, or if the alignment is just right, it can magnify them like a natural telescope.”

Roman’s view will be large and sharp enough to study this lensing effect on a small scale to see how clumps of dark matter warp the appearance of distant galaxies. Astronomers will create a detailed map of the large-scale distribution of matter — both seen and unseen — throughout the universe and fill in more of the gaps in our understanding of dark matter. Studying how structures grow over time will also help astronomers explore dark energy’s strength at various cosmic stages.

“The data analysis standards required to measure weak gravitational lensing are such that the astronomy community as a whole will benefit from very high-quality data over the full survey area, which will undoubtedly lead to unexpected discoveries,” said Olivier Doré, a senior research scientist at NASA’s Jet Propulsion Laboratory in Southern California, who leads a team focused on Roman imaging cosmology with the High-Latitude Wide-Area Survey. “This survey will accomplish much more than just revealing dark energy!” While NASA’s Hubble and James Webb space telescopes both also study gravitational lensing, the breakthrough with Roman is its large field of view.

“Weak lensing distorts galaxy shapes too subtly to see in any single galaxy — it’s invisible until you do a statistical analysis,” Hickox said. “Roman will see more than a billion galaxies in this survey, and we estimate about 600 million of them will be detailed enough for Roman to study these effects. So Roman will trace the growth of structure in the universe in 3D from shortly after the big bang to today, mapping dark matter more precisely than we’ve ever done before.”

Sounding out dark energy

Roman’s wide-area survey will also gather spectra from around 20 million galaxies. Analyzing spectra helps show how the universe expanded during different cosmic eras because when an object recedes, all of the light waves we receive from it are stretched out and shifted toward redder wavelengths — a phenomenon called redshift.

By determining how quickly galaxies are receding from us, carried by the relentless expansion of space, astronomers can find out how far away they are — the more a galaxy’s spectrum is redshifted, the farther away it is. Astronomers will use this phenomenon to make a 3D map of all the galaxies measured within the survey area out to about 11.5 billion light-years away.

That will reveal frozen echoes of ancient sound waves that once rippled through the primordial cosmic sea. For most of the universe’s first half-million years, the cosmos was a dense, almost uniform sea of plasma (charged particles).

Rare, tiny clumps attracted more matter toward themselves gravitationally. But it was too hot for the material to stick together, so it rebounded. This push and pull created waves of pressure—sound — that propagated through the plasma.

Over time, the universe cooled and the waves ceased, essentially freezing the ripples (called baryon acoustic oscillations) in place. Since the ripples were places where more matter was collected, slightly more galaxies formed along them than elsewhere. As the universe expanded over billions of years, so did these structures.

These rings act like a ruler for the universe. Today, they are about 500 million light-years wide. Roman will precisely measure their size across cosmic time, revealing how dark energy may have evolved.

Recent results from other telescopes hint that dark energy may be shifting in strength over cosmic time. “Roman will be able to make high precision tests that should tell us whether these hints are real deviations from our current standard model or not,” said Risa Wechsler, director of Stanford University’s KIPAC (Kavli Institute for Particle Astrophysics and Cosmology) in California and co-chair of the committee that shaped the survey’s design. “Roman’s imaging survey combined with its redshift survey give us new information about the evolution of the universe — both how it expands and how structures grow with time — that will help us understand what dark energy and gravity are doing at unprecedented precision.”

Altogether, Roman will help us understand the effects of dark energy 10 times more precisely than current measurements, helping discern between the leading theories that attempt to explain why the expansion of the universe is speeding up.

Because of the way Roman will survey the universe, it will reveal everything from small, rocky objects in our outer solar system and individual stars in nearby galaxies to galaxy mergers and black holes at the cosmic frontier over 13 billion years ago.

“Roman is exciting because it covers such a wide area with the image quality only available in space,” Wechsler said. “This enables a broad range of science, from things we can anticipate studying to discoveries that we haven’t thought of yet.”

The Nancy Grace Roman Space Telescope is managed at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, with participation by NASA’s Jet Propulsion Laboratory in Southern California; Caltech/IPAC in Pasadena, California; the Space Telescope Science Institute in Baltimore; and a science team comprising scientists from various research institutions. The primary industrial partners are BAE Systems Inc. in Boulder, Colorado; L3Harris Technologies in Rochester, New York; and Teledyne Scientific & Imaging in Thousand Oaks, California.




By Ashley Balzer
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Media contact:

Claire Andreoli
NASA’s Goddard Space Flight Center , Greenbelt, Md
301-286-1940


Thursday, March 05, 2026

Proto-stellar disks in their natural habitat

Figure 1: Young disks observed with ALMA at a wavelength of 3 mm. These disks clearly display substructure and the early presence of companion stars. from: Maureira et al., 2025, A&A, 705, A96

Figure 2: Zoom simulations of proto-stellar disk formation inside a molecular cloud (large image). The colour scale indicates the the gas column densities. The insets show multiple zoom regions, in which several dense cores have formed. Six cores (labels and orange borders) were studied in more detail. © MPA

Figure 3: High resolution views of the resulting proto-stellar disks for various simulations of Core 1: the ‘control’ case without magnetic fields called ‘hydro’ (left), the absence of a disk with ‘ideal’ MHD (middle), and the disk forming in the most realistic ‘non-ideal’ MHD simulation (right), including ambipolar diffusion. © MPA



Sun-like stars form within turbulent molecular clouds, encircled by disks of gas and dust - the birthplaces of planets. While the earliest phases of the disk assembly process are obscured by the surrounding dense gas, ALMA can observe proto-stellar disks shortly after their formation. In a project supported by the Excellence Cluster ORIGINS, researchers from MPA, MPE, Harvard, and the University of Cologne performed high-resolution non-ideal magneto-hydrodynamical simulations that self-consistently follow proto-stellar disk formation from their parental turbulent molecular clouds down to stellar scales, spanning over 10 orders of magnitude. The study uncovers the complex paths by which disks assemble and demonstrates that magnetic fields play a central role in their formation and early evolution.

The interstellar medium (ISM), the site of star formation in galaxies, is a very complex environment. Diffuse hot regions (with temperatures of several million Kelvin) often exist in close proximity to cold, dense molecular clouds (with temperatures below a few hundred Kelvin). ‘Stellar feedback’, e.g. the explosion of massive stars as supernovae, creates the hot gas and drives turbulent gas motion in the ISM. This turbulence also causes cooling and can lead to gravitational collapse in certain regions, which form molecular clouds. Stars and their proto-stellar disks form in these molecular clouds from dense cores.

This process covers a large range of spatial scales: using the distance between earth and sun, an ‘astronomical unit’ or AU, as a ruler, the scales range from several 10 million AU for the size of molecular clouds, to a million AU large ‘bubbles’ created by supernovae, to regions smaller than a per cent of an AU for a newly forming proto-star. Specific numerical techniques are required to simulate such a system, as using equally high resolution everywhere would overwhelm even supercomputers. Most previous studies of disk formation simplify the problem and focus on the final disk formation phase after the collapse of dense cloud cores with uniform densities and turbulent velocities imposed by hand. This, however, misses the self-consistent formation of the cloud core structure, kinematics, and magnetic fields from its the large-scale environment.

How important are magnetic fields in this picture? It is well established observationally that clouds cores are strongly magnetized, which impacts their evolution. ‘Ideal’ magneto-hydrodynamical (MHD) models assume that magnetic fields are carried along with the gas. They back-react on the gas through the Lorentz force and provide support against gravitational collapse. The Lorentz force also works against the rotational twisting of magnetic field lines - a situation encountered where a rotating disk surrounds a young star. This resistance slows down gas so much that it falls onto the star, while fast-rotating material leaves the system in a proto-stellar wind - leaving no disks behind. However, extended proto-stellar disks are regularly observed around young stars (Figure 1) – inconsistent with ‘ideal’ MHD models.

This problem can be solved with more realistic ‘non-ideal’ MHD models where neutral and ionized particles move differently (ambipolar diffusion).

With this process, magnetic fields in collapsing cores are reduced and proto-stellar disks are able to form. Numerical simulations of this process are expensive but essential to understand proto-stellar disk formation.

In a project supported by the DFG Excellence Cluster ‘ORIGINS’ researchers from the Max Planck Institute for Astrophysics (MPA,), the Max Planck Institute for Extraterrestrial Physics (MPE,), Harvard, and the University of Cologne performed high-resolution non-ideal MHD ‘zoom’ simulations to self-consistently follow proto-stellar disk formation from their parent turbulent, multi-phase molecular clouds down to stellar sub-AU scales. The unprecedented ‘non-ideal’ MHD simulations span over 10 orders of magnitude in spatial scales.

In this setup with a realistic large-scale turbulent environment (Figure 2), no extended proto-stellar disks can form with ‘ideal’ MHD, while ‘non-ideal’ MHD allows for the early formation of a disk, similar to what is seen in the ‘hydro’ model without any magnetic field (Figure 3). However, the substructures of the disks formed in these different models are clearly distinct from each other. The study indicates that magnetic fields, along with non-ideal MHD effects, and the large-scale, multi-phase and turbulent environment play a central role for proto-stellar disk formation.

Ongoing work building on this study will focus on the evolution of these disks formed in realistic environments over a longer time-span. This will also allow the researchers to study how early stellar companions form.




Authors:

Alexander Mayer
PhD student
Tel:
2042
amayer@mpa-garching.mpg.de

Thorsten Naab
Scientific Staff
tnaab@mpa-garching.mpg.de



Original publication

Mayer, Alexander C.; Naab, Thorsten; Caselli, Paola; et al.
Protostellar discs in their natural habitat ─ the formation of protostars and their accretion discs in the turbulent and magnetized interstellar medium
Monthly Notices of the Royal Astronomical Society, Volume 543, Issue 4, pp. 3321-3344, 24 pp.

DOI


Wednesday, March 04, 2026

How giant galaxies could form just 1.4 billion years after the Big Bang

Clusters of young galaxies in the early Universe that later grow into large clusters are called protoclusters. This artist’s impression of the protocluster SPT2349-56 shows interacting galaxies of different shapes and sizes, and gas (orange) that is torn apart and heated by tidal forces. Due to its great distance from Earth, we see SPT2349-56 as it looked only 1.4 billion years after the Big Bang, when the Universe was 10% of its current age. © N.Sulzenauer, MPIfR



To the point

  • An international team led by MPIfR researchers used data from the Atacama Large Millimeter/submillimeter Array (ALMA) to shed light on a central question of galaxy formation.

  • They discovered shock-heated gas in one of the most spectacular aggregations of galaxies in the distant Universe.

  • They found evidence that a giant elliptical galaxy may form through the rapid collapse of this infant galaxy cluster.



New radio observations of molecular gas reveal how dozens of galaxies rapidly merge together in the early Universe.

Solving a Cosmic Mystery

A surprising observation has puzzled astronomers for two decades: Massive and evolved galaxies already existed just a few billion years after the Big Bang. Researchers expected to only find galaxies with young stars and ongoing star formation so early in the history of our Universe. Instead, there are many elliptical galaxies with older stellar populations and very little cold gas to form new stars. These observations pose a challenge to models of cosmological structure formation.

The group led by MPIfR astronomers now made a big leap in understanding these systems. “In a Universe where larger galaxies grow hierarchically through gravitational interactions and mergers of smaller building-blocks, some giant ellipticals must have formed completely differently than previously thought. Instead of slowly assembling mass throughout 14 billion years, a massive elliptical galaxy might swiftly emerge in just a few hundred million years. It can form through the collapse and coalescence of a major primordial structure, in the time it takes the Sun to orbit around the Milky Way’s center once”, explains Nikolaus Sulzenauer, PhD researcher at the MPIfR and University of Bonn, and first author leading the analysis. “We find that the structures with the very highest densities must have decoupled first from the Universe’s expansion at only 10% of the current cosmic age, and then rapidly assembled entire protoclusters.” The compression of gas sparks a cosmic firework, prodigiously bright as it is heated by star-birth activity. It is a beacon at far-infrared to millimeter wavelengths and thus accessible by observatories like ALMA and the Atacama Pathfinder Experiment (APEX).

Observing a Transformation

The team observed the cold gas and dust in the center of SPT2349-56, a protocluster seen just 1.4 billion years after the Big Bang and located in the southern constellation Phoenix. SPT2349-56 enables a rare glimpse of the first clusters, the main hubs of massive elliptical galaxies. “SPT2349-56 holds the record for the most vigorous stellar factory”, remarks Axel Weiß, who was also involved in the original discovery of SPT2349-56 with APEX. “In the center, we found four tightly-interacting galaxies forging one star every 40 minutes,” adds Ryley Hill from the University of British Columbia (UBC) in Canada. For comparison, it currently takes a whole year for three or four stars to form in the Milky Way.

“Importantly,” notes Sulzenauer “this galaxy quartet launches coherent giant tidal arms at 300 kilometers per second, stretching over an area much larger than the Milky Way. They glow intensely at submillimeter wavelength, their brightness boosted ten-fold by shock-waves exciting ionized carbon atoms. This bright emission allowed us to precisely measure the motion of gas in this gravitationally ejected spiral, resembling beads on a string encircling the protocluster core. To our surprise, clumps of tidal debris link to a chain of 20 additional colliding galaxies in the outer parts of the collapsing structure. This hints at a common origin. For the first time, we are witnessing the onset of a cascading merging transformation. Most of the 40 gas-rich galaxies in this core will be destroyed and will eventually transform into a giant elliptical galaxy within less than 300 million years – a mere blink of an eye.”

This radio image of the protocluster SPT2349-56 shows the intensity of ionized carbon (CⅡ) emitted at a wavelength of 158 micrometers. Star symbols mark the centers of galaxies, while orange contours highlight the tidal arms around the inner region. These tidally ejected, galaxy-scale gas clumps are found to be ten times brighter than expected. The size of the Milky Way disk is shown at the same scale. © N.Sulzenauer, MPIfR

Understanding How Galaxy Clusters Form

Duncan MacIntyre and Joel Tsuchitori, two UBC undergraduate students and part of the team, ran detailed numerical simulations. These were essential to bridge observations of this protocluster collapse with previous studies of mature galaxy clusters. The striking match between the different types of objects, found at different cosmic times, might not just demonstrate the importance of simultaneous major mergers during massive galaxy formation. It may also help to explain how heavy elements (such as carbon) are heated and transported throughout the first galaxy clusters.

“While our findings offer exciting new insights into rapid elliptical galaxy assembly, the various interactions between the merger shocks, gas heating from the growth of supermassive black holes, and their effect on the fuel for star-formation, remain big mysteries,” remarks Scott Chapman of Dalhousie University. “It might be too early to claim a full understanding of the ‘early childhood’ of giant ellipticals, but we have come a long way in linking tidal debris in protoclusters to the formation process of massive galaxies located in today’s galaxy clusters.”




Additional Information

The following scientists affiliated to the MPIfR are coauthors of this publication:
Nikolaus Sulzenauer, Axel Weiß, Amélie Saintonge.




Contacts:

Nikolaus Sulzenauer
Tel:
+49 228 525-105
Email: nsulzenauer@mpifr-bonn.mpg.de
Max Planck Institute for Radio Astronomy, Bonn

Dr. Axel Weiß
Tel:
+49 228 525-273
Email: aweiss@mpifr-bonn.mpg.de
Max Planck Institute for Radio Astronomy, Bonn

Dr. Nina Brinkmann
Press and Public Relations
Tel:
+49 228 525-399
Email: brinkmann@mpifr-bonn.mpg.de
Max Planck Institute for Radio Astronomy, Bonn



Original publication

Sulzenauer et al.
Bright [CⅡ]158µm Streamers as a Beacon for Giant Galaxy Formation in SPT2349−56 at z = 4.3>
The Astrophyiscal Journal 998 (2026)


DOI



Video




Graphics

  • spt2349_intensity_de 336.87 kB
  • spt2349_intensity_eng 332.3 kB
  • spt2349_tidal_streamers_full_nsulzenauer_2026 326.5 kB



  • Links

    Early Universe
    Research area at the MPIfR

    Paper on the discovery of the protocluster
    Nature 556 (2018)


    Tuesday, March 03, 2026

    NASA’s Webb Examines Cranium Nebula

    The differences in what Webb’s infrared instruments reveal and conceal within the PMR 1 “Exposed Cranium” nebula is apparent in this side-by-side view. More stars and background galaxies shine through NIRCam’s view, while cosmic dust glows more prominently in MIRI’s mid-infrared. Credit Image: NASA, ESA, CSA, STScI; Image Processing: Joseph DePasquale (STScI)

    These images of the “Exposed Cranium” nebula PMR 1, captured by the James Webb Space Telescope’s NIRCam (Near-Infrared Camera) and MIRI (Mid-Infrared Instrument) include compass arrows, scale bar, and color key for reference.Credit Image: NASA, ESA, CSA, STScI; Image Processing: Joseph DePasquale (STScI)

    This video compares infrared views of the PMR 1 “Exposed Cranium” nebula taken by NASA’s retired Spitzer Space Telescope, as well as NASA’s James Webb Space Telecope’s NIRCam (Near-Infrared Camera) and MIRI (Mid-Infrared Instrument). Credit Visualization: NASA, ESA, CSA, STScI, Joseph DePasquale (STScI)



    Two heads are better than one in the latest images from NASA’s James Webb Space Telescope, which reveal new detail in a mysterious, little-studied nebula surrounding a dying star.

    Nebula PMR 1 is a cloud of gas and dust that bears an uncanny resemblance to a brain in a transparent skull, inspiring its nickname, the “Exposed Cranium” nebula. Webb captured its unusual features in both near- and mid-infrared light. The nebula was first revealed in infrared light by a predecessor to Webb, NASA’s now-retired Spitzer Space Telescope, more than a decade ago. Webb’s advanced instruments show detail that enhances the nebula’s brain-like appearance.

    The nebula appears to have distinct regions that capture different phases of its evolution — an outer shell of gas that was blown off first and consists mostly of hydrogen, and an inner cloud with more structure that contains a mix of different gases. Both Webb’s NIRCam (Near-Infrared Camera) and MIRI (Mid-Infrared Instrument) show a distinctive dark lane running vertically through the middle of the nebula that defines its brain-like look of left and right hemispheres. Webb’s resolution shows that this lane could be related to an outburst or outflow from the central star, which typically occurs as twin jets burst out in opposite directions. Evidence for this is particularly notable at the top of the nebula in Webb’s MIRI image, where it looks like the inner gas is being ejected outward.

    While there is still much to be understood about this nebula, it’s clear that it is being created by a star near the end of its fuel-burning “life.” In their end stages, stars expel their outer layers. It’s a dynamic and fairly fast process, in cosmic terms. Webb has captured a moment in this star’s decline. What ultimately happens will depend on the mass of the star, which is yet to be determined. If it’s massive enough, it will explode in a supernova. A less massive Sun-like star will continue to shed layers until only its core remains as a dense white dwarf, which will cool off over eons.

    The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).




    Details:

    Last Updated: Feb 25, 2026
    Location: NASA Goddard Space Flight Center

    Contact Media:

    Laura Betz
    NASA’s Goddard Space Flight Center
    Greenbelt, Maryland

    laura.e.betz@nasa.gov

    Leah Ramsay
    Space Telescope Science Institute
    Baltimore, Maryland


    Christine Pulliam
    Space Telescope Science Institute
    Baltimore, Maryland



    Monday, March 02, 2026

    Largest image of its kind shows hidden chemistry at the heart of the Milky Way

    PR Image eso2603a
    Largest ALMA image ever shows the molecular gas in the centre of the Milky Way

    PR Image eso2603b
    Different molecules in the centre of the Milky Way observed with ALMA

    PR Image eso2603c
    Location of the Central Molecular Zone in the Milky Way



    Videos

    The hidden chemistry at the heart of our galaxy  | Wonders of the Universe
    PR Video eso2603a
    The hidden chemistry at the heart of our galaxy | Wonders of the Universe

    Zooming into the gas at the core of the Milky Way
    PR Video eso2603b
    Zooming into the gas at the core of the Milky Way

    Ashley Barnes talks about ACES
    PR Video eso2603c
    Ashley Barnes talks about ACES

    Katharina Immer talks about ACES
    PR Video eso2603d
    Katharina Immer talks about ACES

    Steve Longmore talks about ACES
    PR Video eso2603e
    Steve Longmore talks about ACES



    Astronomers have captured the central region of our Milky Way in a striking new image, unveiling a complex network of filaments of cosmic gas in unprecedented detail. Obtained with the Atacama Large Millimeter/submillimeter Array (ALMA), this rich dataset — the largest ALMA image to date — will allow astronomers to probe the lives of stars in the most extreme region of our galaxy, next to the supermassive black hole at its centre.

    It’s a place of extremes, invisible to our eyes, but now revealed in extraordinary detail,” says Ashley Barnes, an astronomer at the European Southern Observatory (ESO) in Germany who is part of the team that obtained the new data. The observations provide a unique view of the cold gas — the raw material from which stars form — within the so-called Central Molecular Zone (CMZ) of our galaxy. It is the first time the cold gas across this whole region has been explored in such detail.

    The region featured in the new image spans more than 650 light-years. It harbours dense clouds of gas and dust, surrounding the supermassive black hole at the centre of our galaxy. “It is the only galactic nucleus close enough to Earth for us to study in such fine detail,” says Barnes. The dataset reveals the CMZ like never before, from gas structures dozens of light-years across all the way down to small gas clouds around individual stars.

    The gas that ACES — the ALMA CMZ Exploration Survey — specifically explores is cold molecular gas. The survey unpacks the intricate chemistry of the CMZ, detecting dozens of different molecules, from simple ones such as silicon monoxide to more complex organic ones like methanol, acetone or ethanol.

    Cold molecular gas flows along filaments feeding into clumps of matter out of which stars can grow. In the outskirts of the Milky Way we know how this process happens, but within the central region the events are much more extreme. “The CMZ hosts some of the most massive stars known in our galaxy, many of which live fast and die young, ending their lives in powerful supernova explosions, and even hypernovae,” says ACES leader Steve Longmore, a professor of astrophysics at Liverpool John Moores University, UK. With ACES, astronomers hope to better understand how these phenomena influence the birth of stars and whether our theories of star formation hold in extreme environments.

    By studying how stars are born in the CMZ, we can also gain a clearer picture of how galaxies grew and evolved,” Longmore adds. “We believe the region shares many features with galaxies in the early Universe, where stars were forming in chaotic, extreme environments.”

    To collect this new dataset, astronomers used ALMA, which is operated by ESO and partners in Chile’s Atacama Desert. In fact, this is the first time such a large area has been scanned with this facility, making this the largest ALMA image ever. Seen in the sky, the mosaic — obtained by stitching together many individual observations like putting puzzle pieces together — is as long as three full Moons side-by-side.

    We anticipated a high level of detail when designing the survey, but we were genuinely surprised by the complexity and richness revealed in the final mosaic," says Katharina Immer, an ALMA astronomer at ESO who is also part of the project. The data from ACES are presented in five papers accepted for publication in Monthly Notices of the Royal Astronomical Society, with a sixth in the final review stages.

    The upcoming ALMA Wideband Sensitivity Upgrade, along with ESO’s Extremely Large Telescope, will soon allow us to push even deeper into this region — resolving finer structures, tracing more complex chemistry, and exploring the interplay between stars, gas and black holes with unprecedented clarity,” says Barnes. “In many ways, this is just the beginning.”

    Source: ESO/News



    More information

    This research was presented in a series of papers presenting the ACES data, to appear in Monthly Notices of the Royal Astronomical Society:

    • Paper I - ALMA Central Molecular Zone Exploration Survey (ACES) I: Overview paper https://arxiv.org/abs/2602.20340

    • Paper II - ALMA Central Molecular Zone Exploration Survey (ACES) II: 3mm continuum images https://arxiv.org/abs/2602.20240

    • Paper III - ALMA Central Molecular Zone Exploration Survey (ACES) III: Molecular line data reduction and HNCO & HCO+ data https://arxiv.org/abs/2602.20276

    • Paper IV - ALMA Central Molecular Zone Exploration Survey (ACES) IV: Data of the two intermediate-width spectral windows https://arxiv.org/abs/2602.20445

    • Paper V - ALMA Central Molecular Zone Exploration Survey (ACES) V: CS(2-1), SO 2_3-1_2, CH3CHO 5_(1,4)-4_(1,3), HC3N(11-10) and H40A lines data

    • Paper VI - ALMA Central Molecular Zone Exploration Survey (ACES) VI: ALMA Large Program Reveals a Highly Filamentary Central Molecular Zone (undergoing minor revision) https://arxiv.org/abs/2602.20262

    The data itself will be available from the ALMA Science Portal at https://almascience.org/alma-data/lp/aces.

    The international ACES team is composed of over 160 scientists ranging from Master’s students to retirees, working at more than 70 institutions across Europe, North and South America, Asia, and Australia. The project was instigated and led by Principal Investigator Steven Longmore (Liverpool John Moores University, UK), together with co-PIs Ashley Barnes (European Southern Observatory, Germany), Cara Battersby (University of Connecticut, USA [Connecticut]), John Bally (University of Colorado Boulder, USA), Laura Colzi (Centro de Astrobiología, Madrid, Spain [CdA]), Adam Ginsburg (University of Florida, USA [Florida]), Jonathan Henshaw (Max Planck Institute for Astronomy, Heidelberg, Germany), Paul Ho (Academia Sinica Institute of Astronomy and Astrophysics, Taiwan), Izaskun Jiménez-Serra (CdA), J. M. Diederik Kruijssen (COOL Research DAO), Elisabeth Mills (University of Kansas, USA), Maya Petkova (Chalmers University of Technology, Sweden), Mattia Sormani (Dipartimento di Scienza e Alta Tecnologia (DiSAT), University of Insubria, Italy), Robin Tress (École Polytechnique Fédérale de Lausanne, Switzerland & Institut für Theoretische Astrophysik, Universität Heidelberg, Germany), Daniel Walker (UK ALMA Regional Centre Node, University of Manchester, UK), and Jennifer Wallace (Connecticut).

    Within ACES, the ALMA data reduction working group is coordinated by Adam Ginsburg, Daniel Walker, and Ashley Barnes, and includes Nazar Budaiev (Florida), Laura Colzi (CdA), Savannah Gramze (Florida), Pei-Ying Hsieh (National Astronomical Observatory of Japan, Mitaka, Tokyo, Japan), Desmond Jeff (Florida), Xing Lu (Shanghai Astronomical Observatory, Chinese Academy of Sciences, China), Jaime Pineda (Max-Planck-Institut für extraterrestrische Physik, Germany), Marc Pound (University of Maryland, USA), and Álvaro Sánchez-Monge (Institut de Ciències de l’Espai, CSIC, Bellaterra, Spain; Institut d’Estudis Espacials de Catalunya, Castelldefels, Spain), together with more than 30 additional team members who contributed to the data reduction effort.

    The Atacama Large Millimeter/submillimeter Array (ALMA), an international astronomy facility, is a partnership of ESO, the U.S. National Science Foundation (NSF) and the National Institutes of Natural Sciences (NINS) of Japan in cooperation with the Republic of Chile. ALMA is funded by ESO on behalf of its Member States, by NSF in cooperation with the National Research Council of Canada (NRC) and the National Science and Technology Council (NSTC) in Taiwan and by NINS in cooperation with the Academia Sinica (AS) in Taiwan and the Korea Astronomy and Space Science Institute (KASI). ALMA construction and operations are led by ESO on behalf of its Member States; by the National Radio Astronomy Observatory (NRAO), managed by Associated Universities, Inc. (AUI), on behalf of North America; and by the National Astronomical Observatory of Japan (NAOJ) on behalf of East Asia. The Joint ALMA Observatory (JAO) provides the unified leadership and management of the construction, commissioning and operation of ALMA.

    The European Southern Observatory (ESO) enables scientists worldwide to discover the secrets of the Universe for the benefit of all. We design, build and operate world-class observatories on the ground — which astronomers use to tackle exciting questions and spread the fascination of astronomy — and promote international collaboration for astronomy. Established as an intergovernmental organisation in 1962, today ESO is supported by 16 Member States (Austria, Belgium, Czechia, Denmark, France, Finland, Germany, Ireland, Italy, the Netherlands, Poland, Portugal, Spain, Sweden, Switzerland and the United Kingdom), along with the host state of Chile and with Australia as a Strategic Partner. ESO’s headquarters and its visitor centre and planetarium, the ESO Supernova, are located close to Munich in Germany, while the Chilean Atacama Desert, a marvellous place with unique conditions to observe the sky, hosts our telescopes. ESO operates three observing sites: La Silla, Paranal and Chajnantor. At Paranal, ESO operates the Very Large Telescope and its Very Large Telescope Interferometer, as well as survey telescopes such as VISTA. Also at Paranal, ESO will host and operate the south array of the Cherenkov Telescope Array Observatory, the world’s largest and most sensitive gamma-ray observatory. Together with international partners, ESO operates ALMA on Chajnantor, a facility that observes the skies in the millimetre and submillimetre range. At Cerro Armazones, near Paranal, we are building “the world’s biggest eye on the sky” — ESO’s Extremely Large Telescope. From our offices in Santiago, Chile we support our operations in the country and engage with Chilean partners and society.



    Links




    Contacts:

    Ashley Thomas Barnes
    Astronomical Data Scientist, European Southern Observatory (ESO)
    Garching bei München, Germany
    Tel: +49 89 3200 6729
    Email:
    Ashley.Barnes@eso.org

    Steven Longmore
    Professor of Astrophysics, Astrophysics Research Institute, Liverpool John Moores University
    Liverpool, UK
    Tel: +44 (0)151 231 2929
    Email:
    S.N.Longmore@ljmu.ac.uk

    Katharina Immer
    ALMA Regional Centre Astronomer, European Southern Observatory (ESO)
    Garching bei München, Germany
    Tel: +49 89 3200 6471
    Email:
    Katharina.Immer@eso.org

    Adam Ginsburg
    Associate Professor, Department of Astronomy, University of Florida
    Gainesville, FL, USA
    Tel: +1 352-294-1879
    Email:
    adamginsburg@ufl.edu, adam.g.ginsburg@gmail.com

    Daniel Walker
    Astronomer, UK ALMA Regional Centre Node, University of Manchester
    Manchester, UK
    Email:
    daniel.walker-2@manchester.ac.uk
    Pei-Ying Hsieh
    Assistant Professor, National Astronomical Observatory of Japan, Tokyo, Japan
    Email:
    pei-ying.hsieh@nao.ac.jp

    Xing Lu
    Professor, Shanghai Astronomical Observatory, Chinese Academy of Sciences
    Shanghai, China
    Email:
    xinglu@shao.ac.cn, xinglv.nju@gmail.com

    Bárbara Ferreira
    ESO Media Manager
    Garching bei München, Germany
    Tel: +49 89 3200 6670
    Cell: +49 151 241 664 00
    Email:
    press@eso.org