Astronomy. any of the thousands of small bodies of from 480 miles (775 km) to less than one mile (1.6 km) in diameter that revolve about the sun in orbits lying mostly between those of Mars and Jupiter.
Zoology. an asteroidean; a starfish.
asteroid | Define asteroid at Dictionary.com
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Asteroids are minor planets, especially those of the inner Solar System. The
larger ones have also been called planetoids. These terms have historically been
Every once in a while, a meteor will be big enough to weather its fiery descent
and land on Earth, where it earns the title "meteorite." Asteroids are also known
Nov 21, 2014 ... Asteroids are small, airless rocky worlds that revolve around the sun and are too
small to be called planets. They are also called space rocks, ...
Nov 17, 2016 ... Asteroids are small, rocky objects that orbit the sun. Although asteroids orbit the
sun like planets, they are much smaller than planets.
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May 12, 2014 ... Asteroids are minor planets, especially those of the inner Solar System. The
larger ones have also been called planetoids. These terms have ...
Asteroids are rocky-metallic objects which range in size from about the size of
pebbles to around 600 miles (~1,000 km) across. Although they orbit the Sun,
An asteroid is a large rock in outer space. Some, like Ceres, can be very large,
while others are as small as a grain of sand. Due to their smaller size, asteroids ...
Sep 9, 2015 ... 4.6 billion years ago, our Solar System formed from a collection of gas and dust
surrounding our nascent Sun. While much of the gas and dust ...