Microwave
Further information: Radio astronomyAt microwave frequencies, photons are plentiful, but they have very low energy so lots of them need to be collected. At these frequencies, the Cosmic Microwave Background can be measured, as well as point sources and the Sunyaev-Zel'dovich effect, as well as synchrotron radiation and Bremsstrahlung from our own galaxy.
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Cosmic Background Explorer (COBE)
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Artist's impression of Planck
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Artist's impression of WMAP
| Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
|---|---|---|---|---|---|
| Cosmic Background Explorer (COBE) | NASA | 18 November 1989 | 23 December 1993 | Earth orbit (900 km) | |
| Odin | Swedish Space Corporation | 20 February 2001 | — | Earth orbit (622 km) | |
| Planck | ESA | 14 May 2009 | — | Sun-Earth L2 Lagrange point | |
| WMAP | NASA | 30 June 2001 | October 2010 | Sun-Earth L2 Lagrange point |
Read more about this topic: List Of Space Telescopes
Famous quotes containing the word microwave:
“The New Age? It’s just the old age stuck in a microwave oven for fifteen seconds.”
—James Randi (b. 1928)