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.
-
The Hubble Space Telescope
-
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:
“One is not idle because one is absorbed. There is both visible and invisible labor. To contemplate is to toil, to think is to do. The crossed arms work, the clasped hands act. The eyes upturned to Heaven are an act of creation.”
—Victor Hugo (1802–1885)
“I think of consciousness as a bottomless lake, whose waters seem transparent, yet into which we can clearly see but a little way. But in this water there are countless objects at different depths; and certain influences will give certain kinds of those objects an upward influence which may be intense enough and continue long enough to bring them into the upper visible layer. After the impulse ceases they commence to sink downwards.”
—Charles Sanders Peirce (1839–1914)
“Even a purely moral act that has no hope of any immediate and visible political effect can gradually and indirectly, over time, gain in political significance.”
—Václav Havel (b. 1936)