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This is a list of exoplanets within the circumstellar habitable zone that are either under 10 Earth masses or smaller than 2.5 Earth radii, and thus have a chance of being rocky. [ 3 ] [ 1 ] Note that inclusion on this list does not guarantee habitability, and in particular the larger planets are more unlikely to have a rocky composition. [ 4 ]
Mesoplanets would be ideal for complex life, whereas hypopsychroplanets and hyperthermoplanets might only support extremophilic life. The HEC uses the following terms to classify exoplanets in terms of mass, from least to greatest: asteroidan, mercurian, subterran, terran, superterran, neptunian, and jovian.
Based on the serious problems for planetary habitability presented by red dwarf systems and stellar bodies of type F or higher, the only stars that might offer a bearable scenario for life would be those of type K and G. [1] Solar analogs used to be considered as the most likely candidates to host a solar-like planetary system, and as the best ...
Digital enhancement of a NASA image. Credit - Getty Images. S cientists have discovered a new planet that may be able to support human life, according to a new study.. The study, published in ...
"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; Strictland, Ashley (26 August 2021). "This new class of hot ocean worlds could support life". CNN News; Irving, Michael (27 August 2021).
The violent flaring period of a red dwarf's life cycle is estimated to last for only about the first 1.2 billion years of its existence. If a planet forms far away from a red dwarf so as to avoid atmospheric erosion, and then migrates into the star's habitable zone after this turbulent initial period, it is possible for life to develop. [57]
Geochemical cycle of exoplanets Steven Desch: Arizona State University "Periodic Table of Planets"; geochemical modeling [21] Atmospheres of exoplanets Drake Deming: University of Maryland: Analysis of Kepler data to study exoplanet atmospheres [22] Atmospheric evolution William B. Moore: Hampton University "Living, Breathing Planet".
Thus, F-type stars are described as the "hot limit" for stars that can potentially support life, as their lifespan of 2 to 4 billion years would be sufficient for habitability. [10] However, F-type stars emit large amounts of ultraviolet radiation , and without the presence of a protective ozone layer, could disrupt nucleic acid-based life on a ...