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They connect this planet, which they name Planet V, and its disappearance with the Late Heavy Bombardment episode of the Hadean era. [5] [6] Chambers and Lissauer also claim this Planet V most probably ended up crashing into the Sun. Unlike the disruption hypothesis's fifth planet, "Planet V" is not credited with creating the asteroid belt.
As minor planet discoveries are confirmed, they are given a permanent number by the IAU's Minor Planet Center (MPC), and the discoverers can then submit names for them, following the IAU's naming conventions. The list below concerns those minor planets in the specified number-range that have received names, and explains the meanings of those names.
Planet V, a planet thought by John Chambers and Jack Lissauer to have once existed between Mars and the asteroid belt, based on computer simulations. Various planets beyond Neptune: Planet Nine, a planet proposed to explain apparent alignments in the orbits of a number of distant trans-Neptunian objects. Planet X, a hypothetical planet beyond ...
Before 2006, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto were considered as planets. Below is a partial list of these mnemonics: "Men Very Easily Make Jugs Serve Useful Needs, Perhaps" – The structure of this sentence, which is current in the 1950s, suggests that it may have originated before Pluto's discovery.
A planet that consists primarily of an iron-rich core with little or no mantle, such as Mercury. K2-137b, LHS 3844 b (candidates) Lava planet: A theoretical terrestrial planet with a surface mostly or entirely covered by molten lava. Kepler-10b, Kepler-78b: Ocean planet: A theoretical planet which has a substantial fraction of its mass made of ...
Neptune has 16 known moons; the largest, Triton, accounts for more than 99.5 percent of all the mass orbiting the planet. Triton is large enough to have achieved hydrostatic equilibrium, but, uniquely for a large moon, has a retrograde orbit, suggesting it was a dwarf planet that was captured.
Following a proposal of the discovering astronomer, new minor planet names are approved and published by IAU's WGSBN several times a year. [1] The WGSBN applies a set of rules for naming minor planets. [3] These range from syntax restrictions to non-offensive meanings. Over the years the rules have changed several times.
A planet's year depends on its distance from its star; the farther a planet is from its star, the longer the distance it must travel and the slower its speed, since it is less affected by its star's gravity. No planet's orbit is perfectly circular, and hence the distance of each from the host star varies over the course of its year.