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Closest star to the Sun with exactly six [29] exoplanets, and closest K-type main sequence star to the Sun with a multiplanetary system. One of the oldest stars with a multiplanetary system, although it is still more metal-rich than the Sun. None of the known planets is in the habitable zone. [30] 61 Virginis: Virgo: 13 h 18 m 24.31 s: −18 ...
Once lunar or Mars-based infrastructure is sufficiently well-developed, other bodies in the Solar System could be subject to human colonization and exploitation, making humans a multiplanetary species. [5] Space colonization is an important topic in academic debates across many disciplines.
There are eight planets within the Solar System; planets outside of the solar system are also known as exoplanets. Artist's concept of the potentially habitable exoplanet Kepler-186f. As of 7 November 2024, there are 5,787 confirmed exoplanets in 4,320 planetary systems, with 969 systems having more than one planet. [1]
The name Kepler-90 derives directly from the fact that the star is the catalogued 90th star discovered by Kepler to have confirmed planets. [6] The whole star and planet system is designated by just "Kepler-90", without a postfix, with Kepler-90A specifically referring only to the star, if needed for clarity.
First map of an extrasolar planet released HD 189733 b: HD 189733: 2007 The map in question is a thermal emission map. [53] First multi-planet extrasolar system directly imaged HR 8799 b HR 8799 c HR 8799 d HR 8799 e: HR 8799: 2008 First planet discovered with a retrograde orbit: WASP-17b: WASP-17: 2009
Nuclear war is an often-predicted cause of the extinction of humankind. [1]Human extinction or omnicide is the hypothetical end of the human species, either by population decline due to extraneous natural causes, such as an asteroid impact or large-scale volcanism, or via anthropogenic destruction (self-extinction), for example by sub-replacement fertility.
Kepler-9 is located in the constellation Lyra that lies some 632 parsecs away from Earth. With a mass of 1.07 M ☉ and a radius of 1.02 R ☉, Kepler-9 is almost exactly the same size and width of the Sun, being only 7% more massive and 2% wider.
The Omo remains of modern humans found in 1967 near the Ethiopian Kibish Mountains, dated stratigraphically to 195 ± 5 ka, may be related to Ledi-Geraru. [5] Asia, West Asia: Israel: 195–177: Misliya Cave, Mount Carmel: Fossil maxilla is apparently older than remains found at Skhyul and Qafzeh.