HD 40307 g: Perbedaan antara revisi

<!-- PHYS CHARS -->|mean_radius=2.39 <ref name="PHL">[{{Cite web |url=http://phl.upr.edu/projects/habitable-exoplanets-catalog/data/database |title=PHL's Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo]</ref> R_⊕|massaccess-date=7.09<ref2019-07-02 name|archive-date="PHL">[2019-05-21 |archive-url=https://web.archive.org/web/20190521010035/http://phl.upr.edu/projects/habitable-exoplanets-catalog/data/database PHL's Exoplanets Catalog |dead-url=yes Planetary}}</ref> Habitability Laboratory @ UPR Arecibo]R_⊕|mass=7.09<ref name="PHL"/> {{Earth mass|link=y}}|single_temperature=277.6{{citation needed|date=June 2014}}<ref name="PHL-HD40370">{{cite web |title=HEC: Data of Potential Habitable Worlds |url=http://phl.upr.edu/projects/habitable-exoplanets-catalog/data |date=November 12, 2012 |publisher=[[University of Puerto Rico at Arecibo]] (Planetary Habitability Laboratory) |access-date=2019-07-02 |archive-date=2017-12-01 |archive-url=https://web.archive.org/web/20171201032102/http://phl.upr.edu/projects/habitable-exoplanets-catalog/data |dead-url=yes }}</ref>

<!-- NOTES -->}}<span data-segmentid="76" class="cx-segment">'''HD 40307 g''' adalah [[Planet luar tata surya|planet ekstrasurya yang]] mengorbit di [[zona layaklaik huni]] [[HD 40307]] .</span> <span data-segmentid="80" class="cx-segment">Terletak 42 tahun [[Tahun cahaya|cahaya]] ke arah konstelasi [[Pictor]] selatan.</span> <span data-segmentid="83" class="cx-segment">Planet ini ditemukan dengan metode [[kecepatan radial]], menggunakan peralatan [[Pencari Planet Kecepatan Radial Akurasi Tinggi|HARPS]] [[Observatorium Selatan Eropa]] <ref name="tuomi124">{{Cite journal|last=Tuomi|first=Mikko|last2=Anglada-Escude|first2=Guillem|last3=Gerlach|first3=Enrico|last4=Jones|first4=Hugh R. R.|last5=Reiners|first5=Ansgar|last6=Rivera|first6=Eugenio J.|last7=Vogt|first7=Steven S.|last8=Butler|first8=R. Paul|date=2012|title=Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307|journal=Astronomy|volume=549|page=A48|arxiv=1211.1617|bibcode=2013A&A...549A..48T|doi=10.1051/0004-6361/201220268}}</ref><ref name="Space-20121107a6">{{Cite web|url=http://www.space.com/18393-alien-planet-super-earth-habitable-hd-40307g.html|title='Super-Earth' Alien Planet May Be Habitable for Life|last=Wall|first=Mike|date=November 7, 2012|publisher=[[Space.com]]|access-date=November 8, 2012|archive-date=2019-04-12|archive-url=https://web.archive.org/web/20190412234945/https://www.space.com/18393-alien-planet-super-earth-habitable-hd-40307g.html|dead-url=no}}</ref><ref name="Space-20121107b4">{{Cite web|url=http://www.space.com/18390-super-earth-exoplanet-habitable-zone-infographic.html|title=Super-Earth Planet: Potentially Habitable Alien World Explained (Infographic)|last=Tate|first=Karl|date=November 7, 2012|publisher=[[Space.com]]|access-date=November 8, 2012|archive-date=2019-03-30|archive-url=https://web.archive.org/web/20190330044015/https://www.space.com/18390-super-earth-exoplanet-habitable-zone-infographic.html|dead-url=no}}</ref> oleh tim astronom yang dipimpin oleh Mikko Tuomi di Universitas Hertfordshire dan Guillem Anglada-Escude dari [[Universitas Georg August Göttingen|Universitas Goettingen]], [[Jerman]].<ref name="Space-201211082">{{Cite web|url=http://www.tech-stew.com/post/2012/11/08/Astronomers-discover-a-potentially-habitable-Super-Earth-HD40307g.aspx|title=Astronomers discover a potentially habitable Super-Earth HD 40307g (Infographic)|last=Murrin|first=Marc|date=November 8, 2012|publisher=[[tech-stew.com]]|access-date=November 8, 2012|archive-date=2012-11-10|archive-url=https://web.archive.org/web/20121110203130/http://www.tech-stew.com/post/2012/11/08/Astronomers-discover-a-potentially-habitable-Super-Earth-HD40307g.aspx|dead-url=yes}}</ref></span>

<span data-segmentid="93" class="cx-segment">Namun, astronom lain, Rory Barnes dari University of Washington, telah mempelajari orbit planet b, c, dan d</span> <span data-segmentid="94" class="cx-segment">Pertama, Barnes menduga b untuk melakukan pemanasan pasang surut terlalu banyak untuk itu menjadi terestrial, bukannya memprediksi "mini-Neptunus".</span> <span data-segmentid="95" class="cx-segment">Dia berpikir bahwa b, c, dan d semuanya bermigrasi ke dalam,<ref name="barnes">{{Cite journal|last=Barnes, R.|last2=Jackson, B.|last3=Raymond, S.|last4=West, A.|last5=Greenberg, R.|year=2009|title=The HD 40307 Planetary System: Super-Earths or Mini-Neptunes?|journal=[[The Astrophysical Journal]]|volume=695|issue=2|pages=1006–1011|arxiv=0901.1698|bibcode=2009ApJ...695.1006B|doi=10.1088/0004-637X/695/2/1006}}</ref> yang meramalkan juga e dan f, yang lebih jauh, tetapi tidak banyak.</span> <span data-segmentid="96" class="cx-segment">Ada kemungkinan bahwa HD 40307 g juga telah bermigrasi ke tempat sekarang.</span> <span data-segmentid="97" class="cx-segment">Penemu HD 40307 g tidak mencoba untuk menyangkal Barnes, tentang sifat b dan ekstrapolasi ke planet lain.</span> <span data-segmentid="98" class="cx-segment">Komposisi g tidak stabil.<ref>University of Toronto astronomer Ray Jayawardhana, author of Strange New Worlds: The Search for Alien Planets and Life beyond Our Solar System. Paraphrased in {{Cite journal|last=Dan Vergano|date=November 7, 2012|title=Habitable zone 'Super Earth' candidate planet detected|url=https://www.usatoday.com/story/tech/sciencefair/2012/11/07/habitable-super-earth/1690169/|access-date=2019-07-02|archive-date=2022-11-27|archive-url=https://web.archive.org/web/20221127154336/http://www.usatoday.com/story/tech/sciencefair/2012/11/07/habitable-super-earth/1690169/|dead-url=no}}</ref></span> <span data-segmentid="99" class="cx-segment">Penulis utama Mikko Tuomi, juga dari University of Hertfordshire, menyatakan "Jika saya harus menebak, saya akan mengatakan 50-50.</span><span data-segmentid="100" class="cx-segment">.</span><span data-segmentid="101" class="cx-segment">.</span> <span data-segmentid="102" class="cx-segment">Tetapi kebenaran saat ini adalah bahwa kita tidak tahu apakah planet ini adalah Bumi yang besar atau Neptunus yang kecil dan hangat tanpa permukaan yang kokoh. " <ref name="Space-20121107a6"/></span>