Asteroids – NASA Solar System Exploration
Asteroids, sometimes called minor planets, are rocky, airless remnants left over from the early formation of our solar system around 4.6 billion years ago.
The current number of known asteroids is: .
Most of this ancient space junk is found orbiting the Sun between Mars and Jupiter in the main asteroid belt. The asteroids range in size from Vesta – the largest at around 329 miles (530 kilometers) in diameter – to bodies less than 33 feet (10 meters) in diameter. The total mass of all asteroids combined is less than that of Earth’s Moon.
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Did you know?
The total mass of all asteroids in the Main Asteroid Belt combined is less than that of Earth’s Moon.