For Asteroid we have terms and definitions in 4 topics. The topics are Astronomy, Evolution, Planetary Science and Science.

Asteroid (Astronomy)

Small, rocky bodies that orbit the Sun, asteroids range in diameter from a few millimeters to over 250 km. Although all asteriods reflect sunlight, only one, Vesta, can be seen with the unaided eye.

Asteroid (Evolution)

A small rocky or metallic body orbitting the Sun. About 20,000 have been observed, ranging in size from several hundred kilometers across down to dust particles.

Asteroid (Planetary Science)

A small, mostly rocky body orbiting the Sun. Asteroids range in size from 1000 kilometers in diameter to tiny objects you could hold in your hand. Most asteroids orbit the Sun between Mars and Jupiter, and are the source of most meteorites.

Asteroid (Science)

Small rocky bodies in the solar system, many of which are found between the orbits of Mars and Jupiter.

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