Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a subsurface ocean on the icy dwarf planet.

Don’t space out or you’ll miss it. A once-in-a-generation asteroid broader than the width of Manhattan will be passing by the Earth — and there’s a chance you can see it for yourself.

The newcomer replacing Pluto presently goes by “Planet Nine.” If and when it finally shows up, it will get the honor of a ...

Alinda is one of the five largest near-Earth asteroids, coming closer than 9.3 million miles until the year 2200.

YW9 and 2024 PT5, will pass close to Earth on January 9, 2025. NASA confirms they are not a threat. The asteroids have been ...

The early Earth was an extreme place. Asteroids pommeled the surface. Volcanoes spewed lava and carbon dioxide. The thick, ...

The National Aeronautics and Space Administration has issued a warning that two giant asteroids are set to have a close ...