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The Extrasolar Planets Encyclopaedia [9] is an astronomy website, founded in Paris, France at the Meudon Observatory by Jean Schneider in February 1995, [10] [11] which maintains a database of all the currently known and candidate extrasolar planets, with individual "note" pages for each planet and a full list interactive catalog spreadsheet ...
While human population records in orbit developed from 1 in 1961, 2 in 1962, 4–7 in 1969, 7–11 in 1984 and 13 in 1995, [44] to 14 in 2021, 17 in 2023 [45] and 19 in 2024, [46] developing into a continues population of no less than 10 people on two space stations since 5 June 2022 (as of 2024). [47]
Observations of minor planets as well as comets and natural satellites of the Solar System are made by astronomical observatories all over the world and reported to the Minor Planet Center (MPC), a service of the International Astronomical Union. The MPC maintains a data base that stores all observations submitted by these registered observatories.
Planetary habitability in the Solar System is the study that searches the possible existence of past or present extraterrestrial life in those celestial bodies. As exoplanets are too far away and can only be studied by indirect means, the celestial bodies in the Solar System allow for a much more detailed study: direct telescope observation, space probes, rovers and even human spaceflight.
Of the Solar System's eight planets and its nine most likely dwarf planets, six planets and seven dwarf planets are known to be orbited by at least 300 natural satellites, or moons. At least 19 of them are large enough to be gravitationally rounded; of these, all are covered by a crust of ice except for Earth's Moon and Jupiter's Io. [1]
By RYAN GORMAN Scientists may have found Planet X -- the long-rumored object believed to be larger than Earth and further from the sun than Pluto. Planet X and another object dubbed "Planet Y ...
The individuals living at Ranis had 2.9% Neanderthal ancestry, not dissimilar to most people today, the Nature study found. The new timeline allows scientists to understand better when humans left ...
Examining the rocky planets at the centre of the Solar System, Professor Cox examines new evidence about the violent creation of Mercury and the hostile atmosphere of Venus, contrasting them with the life-giving planet Earth and the barren Mars. [9] [10]