GREAT sensor on SOFIA telescope. SOFIA is the Stratospheric Observatory for Infrared Astronomy. It is a 2.5-metre infrared telescope that is flown in its 747SP aircraft to the stratosphere,some 10-50 kilometres above sea level. This allows the detection of infrared light that is normally blocked by water vapour lower in the atmosphere. The GREAT sensor is the German Receiver for Astronomy at Terahertz Frequencies spectrometer. It is used for far-infrared spectroscopy,and will be used to study planetary atmospheres,the galactic interstellar medium,and extragalactic and early Universe processes. Photographed on 21 January 2011 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Tschida, Tom / NASA |
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