dwarf planet

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Noun

Singular
dwarf planet

Plural
dwarf planets

The Simple English Wikipedia has an article on:
  1. A dwarf planet is a type of space object that is smaller than a regular planet. Dwarf planets are spherical (round), but they have smaller space objects nearby them (unlike a planet).
    Pluto is a dwarf planet because, although it is round, there is space junk floating around it.


More information The Solar System (edit), Star ...
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