The idea that Earth has only one moon is considered to be true, but that isn't always the case. In fact, sometimes, it's had ...

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

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.

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

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

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

WB—is estimated to be between 240 and 525 feet across and will pass us at about twice the distance between the Earth and moon ...

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 ...