The object dubbed Earth's "second moon" is actually a quasi-satellite that's accompanied the planet since 1957 — not a true ...

Earth will have a visitor within its orbit for the next several decades, according to astronomers. An asteroid named 2025 PN7 has become a "quasi-moon" to Earth, as it will be sharing an orbit with ...

Earth has one true moon, but there are also several asteroids known as quasi-moons that are in orbit with the sun. A newly discovered asteroid, 2025 PN7, is the seventh confirmed quasi-moon that ...

"In our solar system, the most massive moon is Ganymede, which is still extremely small compared to what we are inferring ...

Astronomers are testing a quieter way of searching for moons beyond the solar system, using careful measurements of motion ...

You may have heard a lot of online chatter about Earth's two moons recently, but that doesn't quite get the discovery right. Earth still only has one true natural satellite — our 2,159-mile-wide moon ...

For researchers at the University of Idaho, spotting a moon 6 miles wide orbiting Uranus, a staggering 1.8 billion miles from Earth, may actually be easier than finding a white cat in a snowstorm. A ...

Scientists working for a NASA-funded project at the University of Arizona said that a possible "mini moon" is currently orbiting the Earth. Kacper Wierzchos of the Catalina Sky Survey tweeted this ...

Earth's quasi-moons are not actually moons, but temporary asteroids that eventually leave Earth’s orbit JPL-Caltech/NASA A new "quasi-moon" named 2025 PN7 has been discovered, according to a ...