As scientists have learned more about Phobos and Deimos (and moons in general), two leading explanations have emerged. One ...

For just a few months, Earth hosted a "second moon," much smaller than our faithful historical companion. This fleeting ...

In How to Kill an Asteroid, Robin George Andrews looks at the successes and shortcomings of planetary defense.

Asteroid Ryugu was altered by water and contains organic molecules older than the Sun. The building blocks of RNA and Vitamin ...

Currently, more than 2 million miles away, the object is too small and faint to see without a powerful telescope.

The samples were collected by Japan's Hayabusa-2 spacecraft, which launched in December 2014 and successfully rendezvoused ...

A recent discovery made by scientists working with a sample of rock from outer space highlights one of the huge challenges ...

Brian Hackney reports on the possible origins of Earth's recent "mini-moon" that is preparing to depart our orbit.

"The fact that terrestrial microbes are the Earth's best colonizers means we can never completely discount terrestrial ...

Scientists have found microorganisms crawling over a sample retrieved from the 200 million-mile-distant asteroid Ryugu. But ...

Astronomers used the Two-meter Twin Telescope to catch a "see-you-soon" image of the departing asteroid 2024 PT5.

The analysis of hundreds of fossilized droppings (plus a little bit of petrified vomit) from roughly 230 million years ago ...