Explore the threat of asteroid Apophis with Neil deGrasse Tyson, examining its orbit, impact risk, and how scientists track potential Earth-killers in our cosmic neighborhood. Judge Delivers Final ...

Scientists estimate there are thousands of asteroids large enough to destroy a city near Earth. NASA is sending a telescope into space to find them.

Imagine a rock the size of a football stadium hurtling through space at thousands of miles per hour, heading straight for a major city, and we have no way to stop it. NASA has just issued a sobering ...

Add Yahoo as a preferred source to see more of our stories on Google. Nasa said that around 15,000 mid-sized asteroids are unaccounted for - Maciej Frolow Astronomers do not know where thousands of ...

The Apophis asteroid, once feared to hit Earth, is less than three years from making an unprecedented approach toward Earth.