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Some moons, minor planets and comets of the Solar System to scale (major planets not to scale) Selected moons, with Earth to scale. Nineteen moons are large enough to be round, and two, Titan and Triton, have substantial atmospheres The number of moons discovered in each year until November 2019
Although the Moon is Earth's only natural satellite, there are a number of near-Earth objects (NEOs) with orbits that are in resonance with Earth. These have been called "second" moons of Earth or "minimoons". [2] [3] 469219 Kamoʻoalewa, an asteroid discovered on 27 April 2016, is possibly the most stable quasi-satellite of Earth. [4]
Artist's depiction of Haumea's ring system. A ring around Haumea, a dwarf planet and resonant Kuiper belt member, was revealed by a stellar occultation observed on 21 January 2017. This makes it the first trans-Neptunian object found to have a ring system. [32] [33] The ring has a radius of about 2,287 km, a width of ≈ 70 km and an opacity of ...
The inner Solar System and the terrestrial planets. 2021 PH27; Mercury. Mercury-crossing minor planets; Venus. Venus-crossing minor planets. 524522 Zoozve, Venus' quasi-satellite; Earth. Moon; Near-Earth asteroids (including 99942 Apophis) Earth trojan (2010 TK 7) Earth-crosser asteroids. Earth's quasi-satellites; 433 Eros; Mars. Deimos; Phobos ...
[70] [71] The known Solar System lacks super-Earths, planets between one and ten times as massive as the Earth, [70] although the hypothetical Planet Nine, if it does exist, could be a super-Earth orbiting in the edge of the Solar System. [72] Uncommonly, it has only small terrestrial and large gas giants; elsewhere planets of intermediate size ...
There are 293 confirmed moons in our cosmic neighborhood. By studying these worlds, astronomers hope to learn about ancient asteroid collisions, space volcanoes, and the origins of life itself.
Solar System – gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets (including Earth), with the remainder being significantly smaller objects, such as dwarf planets and small Solar System bodies.
While these polar moons are of little-to-no impact today, the confirmation of their existence during Earth’s early years has profound implications for the study of exoplanets beyond our Solar ...