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asteroid
(Encyclopedia)asteroid, planetoid, or minor planet, small body orbiting the sun. More than 300,000 asteroids have been identified and cataloged; more than a million are believed to exist in the main belt between M...Pallas
(Encyclopedia)Pallas pl´s [key], in astronomy, 2d asteroid to be discovered. It was found in 1802 by H. Olbers. The second largest asteroid, it has a diameter of c.300 mi (480 km). Its orbit has a semimajor ax...planetoid
(Encyclopedia)planetoid: see asteroid.minor planet
(Encyclopedia)minor planet: see asteroid.Hermes
(Encyclopedia)Hermes, in astronomy: see asteroid.Icarus
(Encyclopedia)Icarus, in astronomy: see asteroid.Eros
(Encyclopedia)Eros, in astronomy: see asteroid.Hidalgo
(Encyclopedia)Hidalgo hdl´g [key], in astronomy: see asteroid.Braille
(Encyclopedia)Braille brl [key], in astronomy, a small asteroid notable because it has the same atypical geologic composition as the larger asteroid Vesta. In 1999 the space probe Deep Space 1 passed within 16 mi...Trojan asteroids
(Encyclopedia)Trojan asteroids, asteroids that revolve about the sun in the same orbit as a planet, occupying stable positions (known as Lagrangian points) either about 60° ahead of the planet in the orbit or abou...Browse by Subject
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