A minor-planet moon is an astronomical body that orbits a minor planet as its natural satellite. It is thought that many asteroids and Kuiper belt objects may possess moons, in some cases quite substantial in size. Discoveries of minor-planet moons (and binary objects, in general) are important because the determination of their orbits provides estimates on the mass and density of the primary, allowing insights of their physical properties that is generally not otherwise possible. As of November 2011, there are over 200 minor planets known to have moons.
Read more about Minor-planet Moon: Terminology, Discovery Milestones, Commonality, Origin, Populations, Dwarf Planets
Famous quotes containing the word moon:
“Though it seems improbable on the face of it
You must master the huge retards and have faith in the slow
Blossoming of haystacks, stairways, walls of convolvulus,
Until the moon can do no more. Exhausted,
You get out of bed. Your project is completed
Though the experiment is a mess.”
—John Ashbery (b. 1927)