The universe has quasi-moons, mini-moons, and moonlets, but no official definition of what counts as a moon.

The Earth often gets a few visitors in the solar system, but some stick around for a while. Here's what to know about the ...

As mankind was planning the first moon landing in the 1960s, an asteroid approached Earth—and still hasn’t left.

Scientists have discovered asteroid 2025 PN7, a celestial body now identified as a quasi-satellite. This asteroid will orbit ...

The moon isn’t alone; astronomers have discovered a new quasi-moon that’s following Earth’s orbit, but it’s only sticking ...

NASA confirmed this week that the rock discovered by the University of Hawaii is the small asteroid 2025 PN7, which astronomers have confirmed as a quasi-moon- a rare type of celestial body ...

Scientists say it's not a true moon, but it keeps pace with Earth, looping around the Sun in a path so similar that it ...

Earth still only has one true natural satellite — our 2,159-mile-wide moon oribiting about 239,000 miles away. However, ...

Astronomers have discovered a small asteroid, 2025 PN7, that travels alongside Earth and behaves like a ‘quasi moon.’ You’ll ...

SpaceX writes that the next-generation Artemis Moon missions are about laying the foundation for building a permanent ...

Elon Musk's SpaceX defended its progress developing a Moon lander in a blog post Thursday, following NASA's decision to ...

On Oct. 30, SpaceX posted an update about its Starship moon-landing plans, which includes a reference to a possible ...