氫氣海洋行星[1](英語:Hycean planet,Hycean 是由 hydrogen 和 ocean 兩個英文字合成一個新名詞),是一種假設的宜居行星,描述為熱的、由水覆蓋表面的行星,它的大氣層含有大量氫氣,可能能夠孕育生命。[2][3][4][5][6][7][8][9][10][11]據研究人員稱,根據行星密度,氫氣海洋行星可能包括類地的超級地球以及迷你海王星(如K2-18b)[12],因此,預計系外行星種群中的數量會很多。[2] 氫氣海洋行星可能“比之前考慮的宜居行星要大得多,半徑為2.6 R⊕(2.3 R⊕),質量為10 M⊕(5 M⊕)”。[2]此外,此類行星的宜居帶(HZ)可能“比類地行星的HZ寬得多”。地球望遠鏡和太空望遠鏡可能很快就會研究海斯行星的生命印跡,例如計劃於 2021 年晚些時候發射的詹姆斯·韋伯太空望遠鏡 (JWST)。[2][11]
參見
參考資料
- ^ 香港天文應用程式2021年8月29日新聞報導
- ^ 2.0 2.1 2.2 2.3 Madhusudhan, Nikku; Piette, Anjali a. A.; Constantinou, Savvas. Habitability and Biosignatures of Hycean Worlds. The Astrophysical Journal. 26 August 2021, 918 (1) [27 August 2021]. doi:10.3847/1538-4357/abfd9c. (原始内容存档于2022-04-28).
- ^ University of Cambridge. New class of habitable exoplanets represent a big step forward in the search for life. Phys.org. 25 August 2021 [27 August 2021]. (原始内容存档于2022-05-06).
- ^ Davis, Nicola. ‘Mini-Neptunes’ beyond solar system may soon yield signs of life - Cambridge astronomers identify new hycean class of habitable exoplanets, which could accelerate search for life. The Guardian. 25 August 2021 [27 August 2021]. (原始内容存档于2022-04-06).
- ^ Carter, Jamie. Is Alien Life Hiding In Plain Sight? New Class Of ‘Hycean’ Planet Is Where We Should Look, Say Scientists. Forbes. 25 August 2021 [25 August 2021]. (原始内容存档于2022-04-07).
- ^ Starr, Michelle. We Could Discover Alien Life on This New Class of 'Hycean' Exoplanets, Study Says. ScienceAlert. 26 August 2021 [27 August 2021]. (原始内容存档于2022-04-12).
- ^ Wall, Mike. Alien life could thrive on big 'Hycean' exoplanets - Hycean planets are up to 2.5 times bigger than Earth, with oceans and hydrogen-rich atmospheres.. Space.com. 26 August 2021 [27 August 2021]. (原始内容存档于2022-05-10).
- ^ Strictland, Ashley. This new class of hot ocean worlds could support life. CNN News. 26 August 2021 [27 August 2021]. (原始内容存档于2021-12-28).
- ^ Irving, Michael. Say hi to Hycean worlds, a new class of exoplanet that could host life. NewAtlas.com. 26 August 2021 [27 August 2021]. (原始内容存档于2021-09-14).
- ^ Staff. Astronomers Identify New Class of Exoplanets: Hycean Worlds. Science News. 26 August 2021 [27 August 2021]. (原始内容存档于2022-04-11).
- ^ 11.0 11.1 Staff. Alien life could be living on big 'Hycean' exoplanets. BBC News. 27 August 2021 [27 August 2021]. (原始内容存档于2022-01-06).
- ^ Cohen, Liz. Scientists may find life on Earth-like planets covered in oceans within the next few years. CBS News. 27 August 2021 [28 August 2021]. (原始内容存档于2022-04-21).