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The planets are, in order of distance from the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. There are three main belts of minor bodies: The asteroid belt, between Mars and Jupiter. The Kuiper belt beyond Neptune, followed by the scattered disc. The Oort cloud in the boundaries of the Solar System.
The moons of the trans-Neptunian objects (other than Charon) have not been included, because they appear to follow the normal situation for TNOs rather than the moons of Saturn and Uranus, and become solid at a larger size (900–1000 km diameter, rather than 400 km as for the moons of Saturn and Uranus).
Near the time of the equinoxes, the Sun faces the equator of Uranus, giving a period of day–night cycles similar to those seen on most of the other planets. One result of this axis orientation is that, averaged over the Uranian year, the near-polar regions of Uranus receive a greater energy input from the Sun than its equatorial regions.
Such a fate awaits the moons Phobos of Mars (within 30 to 50 million years), [111] Triton of Neptune (in 3.6 billion years), [112] and at least 16 small satellites of Uranus and Neptune. Uranus's Desdemona may even collide with one of its neighboring moons. [113] A third possibility is where the primary and moon are tidally locked to each other ...
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Titan is the second largest satellite in the Solar System, and is slightly larger than Mercury, but less massive. [12] [6] [7] Iapetus: 1671 1700s [13] [11] [6] [7] Rhea: 1672 1700s Tethys: 1684 1700s [14] [11] [6] [7] Dione: 1684 1700s Titania: 1787 1700s Moons of Uranus: Originally presented as satellite planets orbiting the planet Uranus. [15]
The ice giants Uranus and Neptune live up to their name. Although humans have only ever sent one spacecraft (Voyager 2) toward these far-flung worlds, scientists have a pretty good idea that these ...
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