dwarf planet

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Noun[change]

Singular
dwarf planet

Plural
dwarf planets

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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.


The Solar System (edit)
Star Sun
Planets MercuryVenusEarthMarsJupiterSaturnUranusNeptune
Dwarf planets CeresErisPluto
Small solar system bodies asteroid beltcometsKuiper beltmeteorsOort cloudscattered disc
Other Moonmoons