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Goddard High Resolution Spectrograph

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GHRS being removed during Servicing Mission 2.

The Goddard High Resolution Spectrograph (GHRS or HRS) was a spectrograph installed on the Hubble Space Telescope. It was replaced by the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) in 1997.[1] The instrument is named after 20th century rocket pioneer Robert H. Goddard.[2]

One of the results was the discovery of tenuous atmosphere for Jupiter's moon Europa in 1995.[3] The gas was determined to be mostly of molecular oxygen (O2).[3][4] The surface pressure of Europa's atmosphere is 0.1 μPa, or 10−12 times that of the Earth.[5]

GHRS facts

A technical description of the construction and operation of the GHRS can be found in NASA technical report CP-2244.[6]

References

  1. ^ SM3A
  2. ^ "About the Telescope". Live from the Hubble Space Telescope. Passport to Knowledge. Retrieved 2017-02-22.
  3. ^ a b Hall, D. T.; Strobel, D. F.; Feldman, P. D.; McGrath, M. A.; Weaver, H. A. (1995). "Detection of an oxygen atmosphere on Jupiter's moon Europa". Nature. 373 (6516): 677–681. Bibcode:1995Natur.373..677H. doi:10.1038/373677a0. PMID 7854447.
  4. ^ Savage, Donald; Jones, Tammy; Villard, Ray (23 February 1995). "Hubble Finds Oxygen Atmosphere on Europa". Project Galileo. NASA, Jet Propulsion Laboratory. Retrieved 17 August 2007.
  5. ^ McGrath (2009). "Atmosphere of Europa". In Pappalardo, Robert T.; McKinnon, William B.; Khurana, Krishan K. (eds.). Europa. University of Arizona Press. ISBN 0-8165-2844-6.
  6. ^ The Space Telescope Observatory (Technical report). NASA. 1982. CP-2244., page 76. A 40 MB PDF file.
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