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 ...

Everything was going great until it wasn't in the skies over Cornwall, UK on Monday. Virgin Orbit, the space launch division of Sir Richard Branson's sprawling commercial empire, was in the midst of ...

Scientists have discovered a previously unknown quasi-moon that’s been shadowing Earth’s orbit for decades, undetected, and will likely remain there for a few decades more. The quasi-moon, named 2025 ...

Researchers are discussing 2025 PN7, a small celestial body that's following a similar orbital path to our planet's without ...

A NASA spacecraft erected a large, foil solar sail in orbit around Earth last week, after a failed attempt days earlier. However, subsequent observations of the spacecraft show it is "tumbling or ...