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Science - Exoplanets - 60 Second Adventures in Astronomy

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Science - Exoplanets - 60 Second Adventures in Astronomy
« on: April 27, 2013, 01:42:28 PM »
An exoplanet or extrasolar planet is a planet that does not orbit the Sun and instead orbits a different star, stellar remnant, or brown dwarf. More than 1800 exoplanets have been discovered (1849 planets in 1160 planetary systems including 471 multiple planetary systems as of 16 November 2014). There are also rogue planets, which do not orbit any star and which tend to be considered separately, especially if they are gas giants, in which case they are often counted, like WISE 0855–0714, as sub-brown dwarfs.

« Last Edit: November 19, 2014, 03:27:28 PM by admin »
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