Gliese 581 g

Gliese 581 g var tidligere en formodet planet i kredsløb om stjernen Gliese 581, der befinder sig 20,5 lysår fra Jorden i stjernebilledet Vægten.

Der er tidligere proklameret at stjernesystemet Gliese 581 havde planeterne Gliese 581 d, Gliese 581 f og Gliese 581 g, men en nærmere undersøgelse viste at de ikke fandtes.^[1]^[2]

Indikationer på at planten eksisterede blev fundet via Keck-observatoriet på Hawaii efter 10 års observation ^[3] ^[4].

Opdagelsen af den formodede planet blev annonceret september 2010. Ved opdagelsen var forskere af den opfattelse, at det var den indtil da mest jordlignende planet der til dette tidspunkt var fundet. Siden er i december 2011 opdaget exoplaneten Kepler-22b, der (hvis Kepler22-b er en klippeplanet) anses at have flere ligheder med Jorden.

Schweiziske forskere har dog slået tvivl om eksistensen af Gliese 581 g, og planeten er endnu ikke endeligt bekræftet i Extrasolar Planets Encyclopaedia.^[5]

Se også

Eksterne henvisninger

Første beboelige eksoplanet fundet 20 lysår væk Arkiveret 1. oktober 2010 hos Wayback Machine Ingeniøren
Forskere har fundet beboelig planet Ekstra Bladet
Forskere finder jordlignende planet Arkiveret 3. oktober 2010 hos Wayback Machine Politiken
Forskere har fundet planet, der ligner vores, Er det jordens afløser? BT
Newly Discovered Planet May Be First Truly Habitable Exoplanet NSF (engelsk)
NASA and NSF-Funded Research Finds First Potentially Habitable Exoplanet Arkiveret 10. marts 2013 hos Wayback Machine NASA (engelsk)

^ 3. jul 2014, ing.dk: Ups! Beboelige exoplaneter var noget helt andet
^ Jul 03, 2014, phys.org: Controversial clues of two 'Goldilocks planets' that might support life are proven false Citat: "...This image shows the location of the three planets remaining in 2014 after a series of studies since 2004. Research published in 2014, led by Penn State astronomers, shows that two of the signals previously attributed to planets in the habitable zone are actually created by activity within the star itself..."The disappearance of these two signals after correcting for the star's activity indicates that these signals in the original data must have been produced by the activity and rotation of the star itself, not by the presence of these two suspected planets..."
^ Keck Observatory discovers the first Goldilocks exoplanet (engelsk)
^ The Lick-Carnegie Exoplanet Survey: A 3.1 M_Earth Planet in the Habitable Zone of the Nearby M3V Star Gliese 581 (engelsk)
^ ""Notes for star Gl 581", The Extrasolar Planets Encyclopaedia". Arkiveret fra originalen 4. juli 2012. Hentet 5. marts 2011.

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[Gliese581dfg-1] 3. jul 2014, ing.dk: Ups! Beboelige exoplaneter var noget helt andet

[2] Jul 03, 2014, phys.org: Controversial clues of two 'Goldilocks planets' that might support life are proven false Citat: "...This image shows the location of the three planets remaining in 2014 after a series of studies since 2004. Research published in 2014, led by Penn State astronomers, shows that two of the signals previously attributed to planets in the habitable zone are actually created by activity within the star itself..."The disappearance of these two signals after correcting for the star's activity indicates that these signals in the original data must have been produced by the activity and rotation of the star itself, not by the presence of these two suspected planets..."

[3] Keck Observatory discovers the first Goldilocks exoplanet (engelsk)

[4] The Lick-Carnegie Exoplanet Survey: A 3.1 M_Earth Planet in the Habitable Zone of the Nearby M3V Star Gliese 581 (engelsk)

[5] ""Notes for star Gl 581", The Extrasolar Planets Encyclopaedia". Arkiveret fra originalen 4. juli 2012. Hentet 5. marts 2011.

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