Image
Infrared telescope
Part of spectrum viewed: Infrared (wavelengths longer than visible light).
Location: In orbit, as most infrared is blocked by the atmosphere.
Sources of radiation:
Stars give off infrared as well as visible light.
Cool stars give off more infrared than visible light.
Dust that has been heated gives off infrared.
Infrared can pass through dust clouds.
Image: The Milky Way imaged by Spitzer. This infrared image shows what cannot be seen in visible light – cooler stars (blue), heated dust (reddish hue) and Sagittarius A-Star as a bright white spot in the middle. Image by NASA/JPL-Caltech/S. Stolovy (Spitzer Science Center/Caltech) and released into the public domain.
Rights: Public domain
Published:18 February 2021Size: 9.26 MB