Infrared Space Observatory (ISO) satellite

Infrared Space Observatory (ISO) satellite

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Credit: NASA/SCIENCE PHOTO LIBRARY

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Caption: The Infrared Space Observatory (ISO) satellite being checked by European Space Agency engineers before its launch in November 1995. The main body of the satellite is a huge flask which surrounds the telescope itself, a 60cm Ritchey-Chretien optical system. The flask contains about 2150 litres of liquid helium, which cools the infrared detectors to just 1. 8 degrees above the absolute zero. ISO will have an observing lifetime of two or three years before its cooling helium runs out. It will carry out observations in the 2. 5- 200 microns infrared band.

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Keywords: astronomical, astronomy, astrophysics, infrared, infrared satellite, infrared space, infrared space observatory, ir, iso, satellite, satellites

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