The 700–1,300 feet-wide space rock deformed rocks more than six miles from the impact site when it hit 600 million years ago.

For an hour, HERA flew as close as 5,600 kilometers from the Martian surface, at a speed of 33,480 kilometers an hour. It ...

Asteroids of this size regularly pass through the Earth's neighborhood, often unnoticed, unless they are actively tracked by NASA and other space agencies. The continuous monitoring of near-Earth ...

A mission to survey the results of a deliberate crash between an asteroid and a NASA spacecraft has taken stunning images of ...

The results of Hera's flyby could ultimately tell us whether Deimos is a captured asteroid or made from debris from a giant ...

A space probe named Hera captured images of Mars' small Deimos moon while on a mission to examine an asteroid.

Like our moon, Deimos is tidally locked to Mars, meaning the same side always faces the planet—the only side visible to ...

"Scientifically there's a huge amount we can learn from asteroids," says Alan Fitzsimmons, an astronomer at Queens University ...

The Hera probe has swung around Mars, using the planet’s gravitational pull to fling itself toward its asteroid target.

On the way to investigate the scene of a historic asteroid collision, a European spacecraft swung by Mars and captured rare ...

On the way to investigate the scene of a historic asteroid collision, a European spacecraft swung by Mars and captured rare images of the red planet’s mysterious small moon Deimos, the European ...