YR4, which orbits the sun every four years and periodically crosses Earth's orbit. The nature of its orbit makes it a ...

The space rock, which measures 150 feet across and is traveling at 38,922 miles per hour, is one of five on NASA's radar.

NASA was recently tracking a large asteroid, known as the "city killer," after finding a small chance of it hitting Earth in ...

It came from outer space! In the early morning of June 30, 1908, people in the remote Tunguska region of Siberia beheld an ...

NASA is monitoring three aircraft-sized asteroids that will zoom past the Earth later today at around 19,000 to 22,200 miles per hour.

Once, a very long time ago, a massive asteroid hit the Earth and wiped out the dinosaurs. In addition to functionally ...

Astronomers believe thousands of large undiscovered asteroids, that could cause regional damage, may be in space.

For a few days in mid-February, headlines around the world buzzed about the potential for an asteroid to hit the Earth in ...

The space rock caused quite a stir after astronomers first spotted it last year on a trajectory bringing it uncomfortably ...

YR4 became the highest-rated asteroid predicted to strike Earth, and although predictions for impact have lowered, not enough ...

YR4 has a very small chance of striking Earth when its orbit briefly intersects our planet's in December 2032.