Extragalactic planet: Difference between revisions
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===Twin Quasar related planet=== |
===Twin Quasar related planet=== |
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A microlensing event in the [[Twin Quasar]] [[gravitational lens]]ing system |
A microlensing event in the [[Twin Quasar]] [[gravitational lens]]ing system was observed in 1996, by [[R. E. Schild]], in the "A" lobe of the lensed quasar. It is predicted that a 3-Earth mass planet in the lensing galaxy, [[YGKOW G1]], caused the event. This was the first '''extragalactic planet''' announced. This however is not a repeatable observation, as it is a one time chance alignment. This predicted planet lies 4 billion light years away. <ref> New Scientist (issue 2037), [http://www.newscientist.com/article/mg15120372.600-science--do-alien-worlds-throng-faraway-galaxy.html Do alien worlds throng faraway galaxy?] ''Govert Schilling'' '''06 July 1996''' </ref><ref> Extrasolar Visions, [http://www.extrasolar.net/planettour.asp?PlanetID=74 "The Q0957+561 Planet"] (accessed 1 September 2009) </ref> |
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===Andromeda Galaxy planets=== |
===Andromeda Galaxy planets=== |
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Revision as of 06:19, 3 September 2009
An extragalactic planet[1] is a planet that is outside the Milky Way Galaxy. Other terms used to describe these are extragalactic extrasolar planet and extragalactic exoplanet.
Twin Quasar related planet
A microlensing event in the Twin Quasar gravitational lensing system was observed in 1996, by R. E. Schild, in the "A" lobe of the lensed quasar. It is predicted that a 3-Earth mass planet in the lensing galaxy, YGKOW G1, caused the event. This was the first extragalactic planet announced. This however is not a repeatable observation, as it is a one time chance alignment. This predicted planet lies 4 billion light years away. [2][3]
Andromeda Galaxy planets
A team of scientists has used gravitational microlensing to come up with a tentative detection of an extragalactic exoplanet in Andromeda, our nearest large galactic neighbour. The lensing pattern fits a star with a smaller companion weighing just 6 or 7 times the mass of Jupiter. This suspected planet is the first announced in the Andromeda Galaxy. [4][5]
References
- ^ Extrasolar Visions, "Extragalactic Worlds" (accessed 1 September 2009)
- ^ New Scientist (issue 2037), Do alien worlds throng faraway galaxy? Govert Schilling 06 July 1996
- ^ Extrasolar Visions, "The Q0957+561 Planet" (accessed 1 September 2009)
- ^ Thaindian News, First extragalactic exoplanet may have been found by gravitational microlensing, 11 June 2009
- ^ New Scientist, First extragalactic exoplanet may have been found, 10 June 2009
See also
 | This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it. |