Astronomy
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An '''Exoplanet''' or '''Extra Solar Planet''' is a [[planet]] orbiting another sun or [[star]] outside the [[Solar System]]. Astronomers are searching for exoplanets because it is possible that some, perhaps many of them of them may sustain [[Extraterrestrial aliens|alien]] life. <ref>http://news.bbc.co.uk/1/hi/sci/tech/7891132.stm</ref> [[SETI]] is seriously looking for alien signals.
 
An '''Exoplanet''' or '''Extra Solar Planet''' is a [[planet]] orbiting another sun or [[star]] outside the [[Solar System]]. Astronomers are searching for exoplanets because it is possible that some, perhaps many of them of them may sustain [[Extraterrestrial aliens|alien]] life. <ref>http://news.bbc.co.uk/1/hi/sci/tech/7891132.stm</ref> [[SETI]] is seriously looking for alien signals.
In early 2009 over 300 exoplanets are known. Most are [[Gas giant]]s at least as big as [[Jupiter]], [[Saturn]], [[Uranus]] and [[Neptune]]. Some are many times the size of Jupiter.
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In late 2009 over 400 exoplanets are known. [http://news.bbc.co.uk/1/hi/sci/tech/8314581.stm] Most are [[Gas giant]]s at least as big as [[Jupiter]], [[Saturn]], [[Uranus]] and [[Neptune]]. Some are many times heavier than Jupiter. Smaller exoplanets may be very common but are harder to find with present intsruments.
   
Others are smaller and could sustain life like the [[Earth]]. COROT-Exo-7b is the smallest yet discovered and has a diameter less than twice that of Earth. Scientists expected such planets before it was found and were not surprised to find it. COROT-Exo-7b orbits close to its sun and must be too hot for our kind of life but others like COROT-Exo-7b may be at the [http://en.wikipedia.org/wiki/Habitable_zone best distance for life]. Scientists plan to look for water and oceans on explanets as life possible on such planets. <ref>http://www.esa.int/esaCP/SEM7G6XPXPF_index_0.html</ref>
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Others are smaller and could sustain life like the [[Earth]]. COROT-Exo-7b is the smallest yet discovered and has a diameter less than twice that of Earth. Scientists expected such planets before it was found and were not surprised to find it. COROT-Exo-7b orbits close to its sun and must be too hot for our kind of life but others like COROT-Exo-7b may be at the [http://en.wikipedia.org/wiki/Habitable_zone best distance for life]. Scientists plan to look for water and oceans on exoplanets as life possible on such planets. <ref>http://www.esa.int/esaCP/SEM7G6XPXPF_index_0.html</ref>
   
 
==See also==
 
==See also==
 
*[[Planetary systems]]
 
*[[Planetary systems]]
*[[Gliese 581 and its Planets]]
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*[[Gliese 581 and its Planets]] There may be life in this system.
 
*[[Carbon Planet]]
 
*[[Carbon Planet]]
 
*[[Chthonian Planet]]
 
*[[Chthonian Planet]]
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*[http://www.esa.int/esaCP/SEM7G6XPXPF_index_0.html COROT discovers smallest exoplanet yet, with a surface to walk on]
 
*[http://www.esa.int/esaCP/SEM7G6XPXPF_index_0.html COROT discovers smallest exoplanet yet, with a surface to walk on]
 
*[http://physicsworld.com/cws/article/news/39256 New method to seek life on exoplanets]
 
*[http://physicsworld.com/cws/article/news/39256 New method to seek life on exoplanets]
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*[http://news.bbc.co.uk/1/hi/sci/tech/8314581.stm Scientists announce planet bounty]
 
 
===Videos===
 
===Videos===
 
*[http://www.youtube.com/watch?v=Bt_dGm2qALA First Time Photos of Extrasolar Planets!] Well worth watching
 
*[http://www.youtube.com/watch?v=Bt_dGm2qALA First Time Photos of Extrasolar Planets!] Well worth watching
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*[http://www.youtube.com/watch?v=LTqm-OvenVc&feature=channel First Image of an Alien Planet]
 
*[http://www.youtube.com/watch?v=M63XDXZp2Jc&feature=related First "Earth-like" planet found (April 2007)] Video about a planet where there may be flattened bugs.
 
*[http://www.youtube.com/watch?v=M63XDXZp2Jc&feature=related First "Earth-like" planet found (April 2007)] Video about a planet where there may be flattened bugs.
 
*[http://www.youtube.com/watch?v=tDnawSj64jg&feature=related Do Other Solar Systems Exist?] Explaining how other planets are discovered.
 
*[http://www.youtube.com/watch?v=tDnawSj64jg&feature=related Do Other Solar Systems Exist?] Explaining how other planets are discovered.
 
*[http://www.youtube.com/watch?v=V9HLIOnTapE&feature=channel Life in the Universe, Just on Earth, or Everywhere?] Life and exoplanets.
 
*[http://www.youtube.com/watch?v=V9HLIOnTapE&feature=channel Life in the Universe, Just on Earth, or Everywhere?] Life and exoplanets.
 
*[http://www.youtube.com/watch?v=wRaLSVQBecU&feature=related Can a Planet Have Two Suns?]
 
*[http://www.youtube.com/watch?v=wRaLSVQBecU&feature=related Can a Planet Have Two Suns?]
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==References==
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<references/>
   
 
<small>Copied from [http://liberapedia.wikia.com/wiki/Exoplanet Liberapedeia]</small>
 
<small>Copied from [http://liberapedia.wikia.com/wiki/Exoplanet Liberapedeia]</small>

Revision as of 11:01, 20 October 2009

An Exoplanet or Extra Solar Planet is a planet orbiting another sun or star outside the Solar System. Astronomers are searching for exoplanets because it is possible that some, perhaps many of them of them may sustain alien life. [1] SETI is seriously looking for alien signals. In late 2009 over 400 exoplanets are known. [1] Most are Gas giants at least as big as Jupiter, Saturn, Uranus and Neptune. Some are many times heavier than Jupiter. Smaller exoplanets may be very common but are harder to find with present intsruments.

Others are smaller and could sustain life like the Earth. COROT-Exo-7b is the smallest yet discovered and has a diameter less than twice that of Earth. Scientists expected such planets before it was found and were not surprised to find it. COROT-Exo-7b orbits close to its sun and must be too hot for our kind of life but others like COROT-Exo-7b may be at the best distance for life. Scientists plan to look for water and oceans on exoplanets as life possible on such planets. [2]

See also

References and External links

Videos

References

Copied from Liberapedeia