Visible
Further information: Visible-light astronomyThe oldest form of astronomy, optical or visible-light astronomy extends from approximately 400 to 700 nm. Positioning an optical telescope in space means that the telescope does not see any atmospheric effects (see astronomical seeing), providing higher resolution images. Optical telescopes are used to look at stars, galaxies, planetary nebulae and protoplanetary disks, amongst many other things.
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The Hubble Space Telescope
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The Kepler Spacecraft Mission
| Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
|---|---|---|---|---|---|
| COROT | CNES & ESA | 27 December 2006 | — | Earth orbit (872–884 km) | |
| Hipparcos | ESA | 8 August 1989 | March 1993 | Earth orbit (223–35,632 km) | |
| Hubble Space Telescope | NASA | 24 April 1990 | — | Earth orbit (586.47–610.44 km) | |
| Kepler Mission | NASA | 6 March 2009 | — | Earth-trailing heliocentric orbit | |
| MOST | CSA | 30 June 2003 | — | Earth orbit (819–832 km) | |
| Swift Gamma Ray Burst Explorer | NASA | 20 November 2004 | — | Earth orbit (585–604 km) |
Read more about this topic: List Of Space Telescopes
Famous quotes containing the word visible:
“When we come down into the distant village, visible from the mountain-top, the nobler inhabitants with whom we peopled it have departed, and left only vermin in its desolate streets. It is the imagination of poets which puts those brave speeches into the mouths of their heroes.”
—Henry David Thoreau (1817–1862)
“All visible objects, man, are but as pasteboard masks. But in each event—in the living act, the undoubted deed—there, some unknown but still reasoning thing puts forth the mouldings of its features from behind the unreasoning mask. If man will strike, strike through the mask!”
—Herman Melville (1819–1891)
“While it is generally agreed that the visible expressions and agencies are necessary instruments, civilization seems to depend far more fundamentally upon the moral and intellectual qualities of human beings—upon the spirit that animates mankind.”
—Mary Ritter Beard (1876–1958)