example, produces crisp images just 10 to 20 arcseconds wide, whereas Hubble's cameras produce crisp images across a 150 arcsecond (2½ arcminutes) field. Furthermore, space telescopes can study the universe across the entire electromagnetic spectrum, most of which is blocked by Earth's atmosphere. Finally, the background sky is darker in space than on the ground, because air absorbs solar energy during the day and then releases it at night, producing a faint—but nevertheless discernible—airglow that washes out low-contrast astronomical objects. See also Hubble (2010 documentary) List of deep fields List of Hubble anniversary images List of largest infrared telescopes List of largest optical reflecting telescopes List of space telescopes References Bibliography The definitive report on the error in the Hubble mirror. Covers the development of the telescope. Contains many of the primary documents such as Spitzer's 1946 article, the Wood's Hole report on STScI autonomy, and the ESA memorandum of understanding. Also includes other NASA astronomy programs. Covers the early history of precursors and proposals. A detailed account of the first servicing mission. Further reading External links Hubble Space Telescope at NASA.gov Spacetelescope.org, a Hubble outreach site by ESA The Hubble Heritage Project and Hubble archives by STScI Hubble archives by ESA Hubble archives by Real-time Hubble location and tracking at uphere.space Blueprints of Hubble by ESA Articles containing video clips Edwin Hubble European Space Agency satellites Great Observatories program Lockheed Corporation NASA satellites Space accidents and incidents in the United States Space science experiments Space telescopes orbiting Earth Spacecraft launched by the Space Shuttle Spacecraft launched in 1990 Ultraviolet telescopes