How asteroids are formed?
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Ever since Earth formed about 4.5 billion years ago, asteroids and comets have routinely slammed into the planet. The most dangerous asteroids are extremely rare, according to NASA. An asteroid capable of global disaster would have to be more than a quarter-mile wide. read more
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Asteroids – Facts and Information about Asteroids
www.space.com
How Asteroids and Comets Formed
www.scienceclarified.com
How Did The Asteroid Belt Form? Was There A Planet There?
www.cosmosup.com
Where Do Asteroids Come From?
www.universetoday.com
