Hypothetical type of planet or moon that may be better-suited for life than Earth
A superhabitable world is a hypothetical type of planet or moon that is better suited than Earth for the emergence and evolution of life. The concept was introduced in a 2014 paper by René Heller and John Armstrong, in which they criticized the language used in the search for habitable exoplanets and proposed clarifications.[2] The authors argued that knowing whether a world is located within the star's habitable zone is insufficient to determine its habitability, that the principle of mediocrity cannot adequately explain why Earth should represent the archetypal habitable world, and that the prevailing model of characterization was geocentric or anthropocentric in nature. Instead, they proposed a biocentric approach that prioritized astrophysical characteristics affecting the abundance and variety of life on a world's surface.[2]
If a world posesses more diverse flora and fauna than there are on Earth, then it would empirically show that its natural environment is more hospitable to life.[3] To identify such a world, one should consider its geological processes, formation age, atmospheric composition, ocean coverage, and the type of star that it orbits. In other words, a superhabitable world would likely be larger, warmer, and older than Earth, with an evenly-distributed ocean, and orbiting a K-type main-sequence star.[4] In 2020, astronomers, building on Heller and Armstrong's hypothesis, identified 24 potentially superhabitable exoplanets based on measured characteristics that fit these criteria.[5]
^Kiang 2008, pp. 48–55.
^ abHeller & Armstrong 2014, p. 50.
^Heller & Armstrong 2014, p. 57.
^Heller & Armstrong 2014, p. 55-59.
^Schulze-Makuch, Heller & Guinan 2020, p. 1394.
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A superhabitableworld is a hypothetical type of planet or moon that is better suited than Earth for the emergence and evolution of life. The concept was...
life forms and liquid water oceans. Subsequent studies, such as "SuperhabitableWorlds" by René Heller and John Armstrong, establish that orange dwarfs...
Earth, statistically. In September 2020, astronomers identified 24 superhabitable planets (planets better than Earth) contenders, from among more than...
"Star next door may host a 'superhabitable' world". New Scientist. "Water Discovered in Remnants of Extrasolar Rocky World Orbiting White Dwarf". Archived...
"In Search for a Planet Better than Earth: Top Contenders for a SuperhabitableWorld". Astrobiology. 20 (12): 1394–1404. Bibcode:2020AsBio..20.1394S....
"In Search for a Planet Better than Earth: Top Contenders for a SuperhabitableWorld". Astrobiology. 20 (12): 1394–1404. Bibcode:2020AsBio..20.1394S....
Rico at Arecibo. There is also a speculative list being developed of superhabitable planets. Surface planetary habitability is thought to require an orbit...
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Constantinou, Savvas (26 August 2021). "Habitability and Biosignatures of Hycean Worlds". The Astrophysical Journal. 918 (1): 1. arXiv:2108.10888. Bibcode:2021ApJ...
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list of exoplanet search projects. EXCEDE FINESSE Origins HabEx LUVOIR New Worlds Mission PEGASE Darwin EChO Eddington Space Interferometry Mission Terrestrial...
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oxygenation, and hence the rise of animals, would ever have occurred on a world where there were no continents to erode". Extraterrestrial free oxygen has...
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