
Asteroid - Wikipedia
An asteroid is a minor planet —an object larger than a meteoroid (thus 1 meter or larger) that is neither a planet nor an identified comet —that orbits within the inner Solar System or is co …
Asteroid | Definition, Size, & Facts | Britannica
Dec 24, 2025 · Asteroid, any of a host of small bodies, about 1,000 km (600 miles) or less in diameter, that orbit the Sun primarily between the orbits of Mars and Jupiter in a nearly flat ring …
Asteroids - Science@NASA
Apr 25, 2025 · Asteroids, sometimes called minor planets, are rocky, airless remnants left over from the early formation of our solar system about 4.6 billion years ago. Most asteroids can be …
ASTEROID Definition & Meaning - Merriam-Webster
The meaning of ASTEROID is any of the small rocky celestial bodies found especially between the orbits of Mars and Jupiter. How to use asteroid in a sentence.
ASTEROID Definition & Meaning | Dictionary.com
Any of numerous small solar system bodies that orbit the Sun primarily in the asteroid belt, a region between the orbits of Mars and Jupiter. Asteroids are intermediate in size between …
Asteroid Definition - Intro to Astronomy Key Term | Fiveable
An asteroid is a small, rocky body that orbits the Sun. Asteroids are remnants of the early solar system and provide valuable insights into the formation and evolution of our planetary system. …
Asteroids - Definition, Examples, Quiz, FAQ, Trivia
Asteroids are rocky objects that orbit the Sun, mostly found in the asteroid belt between Mars and Jupiter. They're sometimes called minor planets or space rocks.