Infrared Astronomical Satellite (IRAS)

Infrared Astronomical Satellite (IRAS)

First space observatory to map the entire sky at infrared wavelengths. IRAS, a U.S.-U.K.-Netherlands satellite, was launched in 1983 and carried a 60-cm (24-in.) telescope. It observed disks of minute, solid dust particles around some young stars, which suggests that these are in the process of forming planetary systems. It also discovered many previously unknown galaxies that emit most of their energy at infrared wavelengths.

This entry comes from Encyclopædia Britannica Concise.
For the full entry on Infrared Astronomical Satellite (IRAS), visit

Seen & Heard

What made you look up Infrared Astronomical Satellite (IRAS)? Please tell us what you were reading, watching or discussing that led you here.

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More