The IR solution! (jan 1, 2000 – jan 1, 2020)
Description:
Since anything warm radiates infrared energy,the detector must be isolated in very cold surroundings; often, it is held near absolute zero (1 to 3 K) by immersing it in liquid helium. The second step is to reduce the radiation emitted by the telescope structure and optics, and to block this heat from reaching the infrared detector.
Added to timeline:
Technology timeline of astronomy
Date:
