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 ...

The microorganisms were seen crawling over a sample which was brought from 200 million-mile-distant asteroid Ryugu ...

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

Earth has a temporary, tiny companion. While not quite a "mini moon," since it will never be captured by Earth's gravity, ...

Astronomers are gearing up to study an asteroid that will revisit Earth in 2025. It is about 33 feet wide and will come quite ...

The samples were collected by Japan’s Hayabusa-2 spacecraft, which launched in December 2014 and successfully rendezvoused with Ryugu in June 2018.

The asteroid 2024 PT5, which was captured by Earth's gravity on September 29 and orbited it as a temporary mini-moon for ...

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.