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- Dictionaryas·ter·oid/ˈastəˌroid/
noun
- 1. a small rocky body orbiting the sun. Large numbers of these, ranging in size from nearly 600 miles (1,000 km) across (Ceres) to dust particles, are found (as the asteroid belt) especially between the orbits of Mars and Jupiter, though some have more eccentric orbits, and a few pass close to the earth or enter the atmosphere as meteors.
- 2. an echinoderm of the class Asteroidea, which comprises the starfishes.
adjective
- 1. relating to or denoting echinoderms of the class Asteroidea.
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An asteroid is a minor planet —an object that is neither a true planet nor an identified comet — that orbits within the inner Solar System. They are rocky, metallic, or icy bodies with no atmosphere.
an object like a very large rock that goes around the sun like a planet: Scientists are hoping an asteroid will clue them in about early life on earth. (Definition of asteroid from the Cambridge Academic Content Dictionary © Cambridge University Press)
Jul 9, 2024 · Scientists can learn about asteroids by studying meteorites: tiny bits of asteroids that have flown through our atmosphere and landed on Earth’s surface. Several NASA space missions have also flown by and observed asteroids.
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.
Asteroids contain minerals, such as nickel, cobalt, and even platinum. The Outer Space Treaty covers the Moon, asteroids, and everything else in outer space. They want to mine asteroids. Thousands of asteroids pass near Earth every year, and scientists believe those asteroids could be very valuable.
An asteroid is a relatively small chunk of rocky minerals that orbits the Sun, often described as a minor planet. When the orbiting object is larger, it's called a planetoid.
Jul 5, 2024 · 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 called the asteroid belt.
Asteroid definition: any of millions of small celestial objects revolving around the sun, often irregularly shaped and having a great range in size, from as small as 6 feet (2 meters) across to about 620 miles (998 kilometers) across.
Overview. 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 found orbiting the Sun between Mars and Jupiter within the main asteroid belt.
Jul 15, 2014 · Asteroids are rocky objects primarily found in the asteroid belt, a region of the solar system that lies more than 2 ½ times as far from the Sun as Earth does, between the orbits of Mars and Jupiter. These objects are sometimes called minor planets or planetoids.
