Asteroids come down in a firing ball of fire at 40,000 mph.

4.6 years ago asteroids and comets hit earth and brought water and carbon materials.

The blocks we use today asteroids and comets brought to earth.

asteroids fly by earth around 40 years.

Asteroids are small Solar System bodies that orbit the sun.

The first asteroid was discovered in 1801.

There are now many groups and organizations that use automated systems to discover near Earth asteroids.

Asteroids are also known as planetoids or minor planets.

The technology used for discovering asteroids .

Asteroid Wormwood : NASA warns of potential City Killer Meteors and tells us to Pray (Mar 20, 2013)
Meteorite Explosion - Russia Chelyabinsk 2/15/2013 - Asteroid expected to pass close by Earth
Big image
NASA Announces Asteroid Identification, Capture and Sampling Initiative