Credit: ESA/Hubble & NASA
Discovered by British astronomer William Herschel over 200 years ago, NGC 2500 lies about 30 million light-years away in the northern constellation of Lynx. As this NASA/ESA Hubble Space Telescope image shows, NGC 2500 is a particular kind of spiral galaxy known as a barred spiral, its wispy arms swirling out from a bright, elongated core.
Barred spirals are actually more common than was once thought. Around two-thirds of all spiral galaxies — including the Milky Way
— exhibit these straight bars cutting through their centres. These
cosmic structures act as glowing nurseries for newborn stars, and funnel
material towards the active core of a galaxy. NGC 2500 is still
actively forming new stars, although this process appears to be
occurring very unevenly. The upper half of the galaxy — where the spiral
arms are slightly better defined — hosts many more star-forming regions
than the lower half, as indicated by the bright, dotted islands of
light.
There is another similarity between NGC 2500 and our home galaxy. Together with Andromeda, Triangulum, and many smaller natural satellites, the Milky Way is part of the Local Group
of galaxies, a gathering of over 50 galaxies all loosely held together
by gravity. NGC 2500 forms a similar group with some of its nearby
neighbours, including NGC 2541, NGC 2552, NGC 2537, and the bright, Andromeda-like spiral NGC 2481 (known collectively as the NGC 2841 group).
Source: ESA/Hubble/Potw
