Le site de vulgarisation scientifique de l’Université de Liège. ULg, Université de Liège
Asteroid

A small deformed object of the solar system composed of rock and ice. We can distinguish two groups: those which evolve in the “main asteroid belt” (between Mars and Jupiter) and those which orbit in the “Kuiper belt” (beyond Neptune, called trans Neptunian objects or OTNs). Their size can vary from a few metres to several hundred kilometers.

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