twomass
Two Micron All-Sky Survey (2MASS) was an astronomical survey that mapped the entire sky in the near-infrared, providing uniform photometry in three bands. The project aimed to create a comprehensive, accessible catalog of celestial sources to support studies of Galactic structure, star formation, and distant galaxies.
Observations were conducted from 1997 to 2001 using two 1.3-meter telescopes, located at Mount Hopkins, Arizona,
The data products include the All-Sky Point Source Catalog (PSC) and the All-Sky Extended Source Catalog (XSC).
2MASS has had a lasting impact on astronomy, enabling studies of the Milky Way’s structure, the census