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Meaning of asteroid
A natural object, such as a rock or fragment of a planet, that orbits the Sun.
Etymology of asteroid
The word "asteroid" comes from the Greek words "aster" meaning star and "eidos" meaning form or shape, because early astronomers thought these objects were small stars.
The term was first used in the early 19th century to describe the newly discovered objects in our solar system that were not comets or planets.
Synonyms
planetoid
meteoroid
space rock
celestial body
rocky object
space debris
comet
meteor
bolide
fireball
shooting star
fallen star
heavenly body
extraterrestrial object
cosmic body
minor planet
orbital body
satellite
moonlet
fragment
shard
chunk
boulder
rock
stone
pebble
grain
particle
dust
debris
flotsam
jetsam
rubble
wreckage
Definitions
- A small rocky object that orbits the Sun, typically found in the asteroid belt between the orbits of Mars and Jupiter.
- A large rock or metallic object that has entered the Earth's atmosphere, producing a bright streak of light, commonly known as a meteor or shooting star.
Usage Examples
- The asteroid belt is a region of space where many small rocky objects orbit the Sun.
- The asteroid that struck Earth 65 million years ago is believed to have caused the extinction of the dinosaurs.
- Astronomers are studying the asteroid's composition to learn more about the early formation of our solar system.