What are Asteroids?
Facts about Asteroids
When Earth formed around 4.5 billion years ago, Asteroids hit into the planet.
Most asteroids are potentally hazardous.
As asteriods go around the sun, they rotate.
On February, 15, 2013, an asteroid hit by Chelyabinsk, which caused a shock wave that injured around 1,200 people.
Types of Asteroids
There is an S type, which is 17% of known asteroids
And there is a M type, which is many of the rest of asteroids
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