mesoplanet
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Mesoplanet — is a term coined by Isaac Asimov to refer to planetary bodies with sizes smaller than Mercury but larger than Ceres. Assuming size is defined by linear dimension (or by volume), mesoplanets should be approximately 1,000 km to 5,000 km… … Wikipedia
Asteroid — For the arcade video game, see Asteroids (video game). For other uses, see Asteroid (disambiguation). A composite image, to scale, of the asteroids that have been imaged at high resolution. As of 2011 they are, from largest to smallest: 4 Vesta,… … Wikipedia
Planet — This article is about the astronomical object. For other uses, see Planet (disambiguation) … Wikipedia
Trans-Neptunian object — A trans Neptunian object (TNO) is any object in the solar system that orbits the sun at a greater distance on average than Neptune. The Kuiper belt, scattered disk, and Oort cloud are three divisions of this volume of space.The orbit of each of… … Wikipedia
Groups of minor planets — An asteroid group or minor planet group is a population of minor planets that have a share broadly similar orbits. Members are generally unrelated to each other, unlike in an asteroid family, which often results from the break up of a single… … Wikipedia
List of Solar System objects by mass — This is a list of Solar System objects by mass, in decreasing order. This list is incomplete because the masses of many minor planets are not accurately known. The ordering is similar to the order of a list of Solar System objects by radius. Some … Wikipedia
Definition of planet — Photograph of the crescent planet Neptune (top) and its moon Triton (center) … Wikipedia
Planemo — A planemo is a celestial object with mass greater than that of an irregularly shaped asteroid, yet smaller than a nuclear reactive brown dwarf or star. This bizarre class of planet sized objects has no suns at all, and instead floats untethered… … Wikipedia
Dwarf planet — Not to be confused with Minor planet. Ceres as seen with the Hubble Space Telescope. It is the only dwarf planet in the asteroid belt … Wikipedia
Clearing the neighbourhood — of its orbit is a criterion for a celestial body to be considered a planet in the Solar System. This was one of the three criteria adopted by the International Astronomical Union (IAU) in its 2006 definition of planet.[1] In the end stages of… … Wikipedia
