![]() However, unlike a planet, a dwarf planet does not have enough gravitational pull to have cleared its neighbourhood of any other celestial objects of significant mass (except for any of its satellites, such as a moon). Secondly, it must have enough mass that it has formed into an approximately round shape under its own gravity (in contrast to, for example, asteroids, which have irregular shapes). Firstly, for a celestial body to be classified as a dwarf planet, it has to orbit our Sun - meaning it must exist within our Solar System. These criteria were decided upon by the International Astronomical Union (IAU) in August 2006. A dwarf planet is a celestial body that is in orbit around the Sun and has enough mass to be roughly round in shape.Ī dwarf planet is a celestial body that only meets two out of the three formal criteria to be considered a planet. ![]()
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