“The giant outer planets (Jupiter, Saturn, Uranus, and Neptune) formed from an agglomeration of billions of comets and the leftover bits and pieces from this formation process are the comets we see today.
“Likewise, today’s asteroids are the bits and pieces left over from the initial agglomeration of the inner planets that include Mercury, Venus, Earth, and Mars.”
While the chances of a major asteroid hitting Earth are small – NASA believes there is a one in 300,000 chance every year that a space rock which could cause regional damage will hit – the devastating prospect is not impossible.
This is why there are now plans in the pipeline which could help Earth from asteroids.
Asteroid alert: NASA shares image of two giant space rocks [PICS]
Alien asteroid: Astronomers spy space rocks ‘of interstellar origin’ [STUDY]
End of the world: NEOWISE, asteroid and Ring of Fire eclipse a ‘sign’ [CLAIM]