https://ideawaza.com/api.php?action=feedcontributions&feedformat=atom&user=198.173.15.0%2F24IdeaWazaWiki - User contributions [en]2026-09-30T13:20:19ZUser contributionsMediaWiki 1.46.0https://ideawaza.com/index.php?title=Gliese_581_d&diff=45728Gliese 581 d2008-06-20T17:51:28Z<p>198.173.15.250: </p>
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<div>{{Planetbox begin <br />
| name = Gliese 581 d<br />
}}<br />
{{Planetbox image<br />
| image = Gliese 581 d-v1.jpg<br />
| caption = Artistic representation of a panoramic view of <br>Gliese 581 d, showing speculative moons.<br />
}}<br />
{{Planetbox star <br />
| star = [[Gliese 581]]<br />
| constell = [[Libra (constellation)|Libra]]<br />
| RA = {{RA|15|19|26}} <br />
| DEC = {{DEC|&minus;07|43|20}}<br />
| dist_ly = 20.4<br />
| dist_pc = 6.27 <br />
| class = M2.5V<br />
}} <br />
{{Planetbox orbit <br />
| period = 84.4<br />
| semimajor = .25<br />
| eccentricity = .2<br />
}}<br />
{{Planetbox character<br />
| mass_earth = >7.7<br />
}} <br />
{{Planetbox discovery <br />
| discovery_date = [[2007-04-24]]<br />
| discoverers = [[Stéphane Udry|Udry]] et al.<br />
| discovery_method = Radial velocity<br />
| discovery_status = unpublished<br />
}} <br />
{{Planetbox end}}<br />
<br />
'''Gliese 581 d''' ({{pronEng|ˈgliːzə}}), also known as '''Wolf 562 d''' and '''HIP 74995 d''', is a "[[super-Earth]]" or large [[terrestrial planet| terrestrial]] [[extrasolar planet]] orbiting the [[red dwarf]] [[star]] [[Gliese 581]].<br /> Gliese 581 d is near the outer edge of the [[habitable zone]]. <br />
<br />
== Discovery ==<br />
The planet was discovered by the team of [[Stéphane Udry]] of the [[Geneva Observatory]] in [[Switzerland]] using the [[HARPS]] instrument on the [[European Southern Observatory]] 3.6 [[meter]] [[telescope]] in [[La Silla]], [[Chile]] on 24 [[April 2007]]. Udry's team employed the [[radial velocity]] technique, in which the size and [[mass]] of a [[planet]] are determined based on the small perturbations it induces in its parent star’s [[orbit]] via [[gravity]].<br />
<br />
The team is confident that the planet exists but recognizes that unlikely events could mimic its existence. They believe the issue will be settled by upcoming studies.<br />
<br />
== Climate and habitability ==<br />
Although Gliese 581 d orbits outside the theoretical [[habitable zone]] of its star, scientists surmise that conditions on the planet may be conducive to supporting life.<ref>http://www.space.com/scienceastronomy/070618_mm_gliese_581d.html</ref> Scientists originally believed that Gliese 581 d would in fact be too cold for [[liquid]] [[water]] to exist, and therefore could not support [[life]] as we understand it. However, due to a theorized [[greenhouse effect]], research now suggests that [[atmospheric]] conditions on the planet could create [[temperature]]s at which water can exist, and therefore the planet may be capable of supporting life. However, these conditions are based on models of the planet, and have not been directly observed.<br />
<br />
==References==<br />
<references /><br />
<br />
== External links ==<br />
*[http://vo.obspm.fr/exoplanetes/encyclo/planet.php?p1=Gl+581&p2=d '''Extrasolar Planets Encyclopaedia''': Gl 581 d]<br />
*[http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=gl+581&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2005&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=200 '''SIMBAD''': V* HO Lib -- Variable Star]<br />
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[[Category:Extrasolar planets]]<br />
[[Category:Libra constellation]]<br />
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[[de:Gliese 581 d]]<br />
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[[fr:Gliese 581 d]]<br />
[[ko:글리제 581 d]]<br />
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[[sv:Gliese 581 d]]</div>198.173.15.250https://ideawaza.com/index.php?title=Gliese_581_d&diff=45727Gliese 581 d2008-06-17T21:19:35Z<p>198.173.15.250: </p>
<hr />
<div>{{Planetbox begin <br />
| name = Gliese 581 d<br />
}}<br />
{{Planetbox image<br />
| image = Gliese 581 d-v1.jpg<br />
| caption = Artistic representation of a panoramic view of <br>Gliese 581 d, showing speculative moons.<br />
}}<br />
{{Planetbox star <br />
| star = [[Gliese 581]]<br />
| constell = [[Libra (constellation)|Libra]]<br />
| RA = {{RA|15|19|26}} <br />
| DEC = {{DEC|&minus;07|43|20}}<br />
| dist_ly = 20.4<br />
| dist_pc = 6.27 <br />
| class = M2.5V<br />
}} <br />
{{Planetbox orbit <br />
| period = 84.4<br />
| semimajor = .25<br />
| eccentricity = .2<br />
}}<br />
{{Planetbox character<br />
| mass_earth = >7.7<br />
}} <br />
{{Planetbox discovery <br />
| discovery_date = [[2007-04-24]]<br />
| discoverers = [[Stéphane Udry|Udry]] et al.<br />
| discovery_method = Radial velocity<br />
| discovery_status = unpublished<br />
}} <br />
{{Planetbox end}}<br />
<br />
'''Gliese 581 d''' ({{pronEng|ˈgliːzə}}), also known as '''Wolf 562 d''' and '''HIP 74995 d''', is a "[[super-Earth]]" or large [[terrestrial planet| terrestrial]] [[extrasolar planet]] orbiting the [[red dwarf]] [[star]] [[Gliese 581]].<br /><br />
Gliese 581 d is near the outer edge of the [[habitable zone]]. <br />
<br />
== Discovery ==<br />
The planet was discovered by the team of [[Stéphane Udry]] of the [[Geneva Observatory]] in [[Switzerland]] using the [[HARPS]] instrument on the [[European Southern Observatory]] 3.6 [[meter]] [[telescope]] in [[La Silla]], [[Chile]] on 24 [[April 2007]]. Udry's team employed the [[radial velocity]] technique, in which the size and [[mass]] of a [[planet]] are determined based on the small perturbations it induces in its parent star’s [[orbit]] via [[gravity]].<br />
<br />
The team is confident that the planet exists but recognizes that unlikely events could mimic its existence. They believe the issue will be settled by upcoming studies.<br />
<br />
== Climate and habitability ==<br />
Although Gliese 581 d orbits outside the theoretical [[habitable zone]] of its star, scientists surmise that conditions on the planet may be conducive to supporting life.<ref>http://www.space.com/scienceastronomy/070618_mm_gliese_581d.html</ref> Scientists originally believed that Gliese 581 d would in fact be too cold for [[liquid]] [[water]] to exist, and therefore could not support [[life]] as we understand it. However, due to a theorized [[greenhouse effect]], research now suggests that [[atmospheric]] conditions on the planet could create [[temperature]]s at which water can exist, and therefore the planet may be capable of supporting life. However, these conditions are based on models of the planet, and have not been directly observed.<br />
<br />
==References==<br />
<references /><br />
<br />
== External links ==<br />
*[http://vo.obspm.fr/exoplanetes/encyclo/planet.php?p1=Gl+581&p2=d '''Extrasolar Planets Encyclopaedia''': Gl 581 d]<br />
*[http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=gl+581&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2005&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=200 '''SIMBAD''': V* HO Lib -- Variable Star]<br />
<br />
[[Category:Extrasolar planets]]<br />
[[Category:Libra constellation]]<br />
<br />
[[de:Gliese 581 d]]<br />
[[es:Gliese 581 d]]<br />
[[fr:Gliese 581 d]]<br />
[[ko:글리제 581 d]]<br />
[[it:Gliese 581 d]]<br />
[[lt:Gliese 581 d]]<br />
[[nl:Gliese 581 d]]<br />
[[pl:Gliese 581 d]]<br />
[[fi:Gliese 581 d]]<br />
[[sv:Gliese 581 d]]</div>198.173.15.250