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

Quasi-moons are not real moons and don't actually orbit the Earth, although they sometimes appear to do so for short periods of time, Phil Nicholson, professor of astronomy at Cornell University, told ...

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

Around the world in 57 days. A new moon is expected to be pulled into the Earth’s orbit by the end of September, but the rare phenomenon won’t last long. The visiting moon is technically an asteroid ...

Earth obtained a new mini-moon, which is actually a near-Earth asteroid, named 2024 PT, on Sept. 29. The asteroid is estimated to be 33 feet wide, about the length of a school bus and at least 300,000 ...

Earth will be "borrowing" an extra moon for nearly two months starting this week. An Arjuna asteroid will become a "mini-moon" event for nearly two months starting Sept. 29, according to a study ...

Stargazers watching the moon this week will notice a few interesting things about its position and surface features. Credit: Creators.com illustration June is one of my favorite months and a perfect ...

Earth just got a new tag-along in space — a little asteroid named 2025 PN7. NASA confirmed this week that the rock, ...

The first and brightest supermoon of 2025 is just days away. October's harvest moon will appear to be the largest moon and will illuminate the sky for several nights. Here's what to know and when to ...

A private spacecraft carrying NASA instruments to the surface of the moon in preparation for astronauts to return in the years ahead has reached lunar orbit about a month into its spaceflight.

The Odysseus lunar lander fired its main engine for six minutes and 48 seconds Wednesday, putting the spacecraft into a 57-mile-high orbit around the moon and setting the stage for a landing try ...