The German Receiver for Astronomy at Terahertz Frequencies spectrometer, or GREAT, is mounted on the Stratospheric Observatory for Infrared Astronomy's telescope in its normal position. When observing, the instrument will move with the telescope plus or minus 20 degrees from its normal 40-degree angle.
January 21, 2011
NASA Photo / Tom Tschida
Page Last Updated: August 1st, 2013
Page Editor: NASA Administrator