- The Strategic Exploration of Exoplanets and Disks with the Subaru (SEEDS) group used its high performance planet and disk imager, HiCIAO, mounted on the Subaru Telescope to conduct its research. The SEEDS Project began in 2009, with observations planned for a five-year period using 120 observing nights at Subaru Telescope.
- Astronomical Unit (AU) is the average distance between Earth and Sun. It is approximately 150 million kilometers (93 million miles).
- The Atacama Large Millimeter/submillimeter Array (ALMA) is
the largest radio interferometer in the world. It is currently under
construction at an altitude of 5,000 meters above sea level in Atacama
desert in Chile. The full ALMA installation will have 66 antennas
working together and separately across a 20 km section of desert. It
will provide high spatial resolution and sensitivity. The observations
at millimeter and submillimeter wavelengths that are capable of tracing
large dust distributions conducted toward the protoplanetary disk around
HL Tauri and shows the clear multiple gaps probably created by planets
sweeping up the surrounding material in this disk.