Something called a "quasi-moon" was discovered in August, and now many are wondering if we should count our new neighbor as a second moon.

How does a planet’s size influence its orbit around its parent star? This is what a recent study published in the Proceedings of the National Academy of Sciences hopes to address as a team of ...

Astronomers have discovered asteroid 2025 PN7, a tiny 'quasi-moon' that has been shadowing Earth in near-synchronised orbit ...

The celestial object is what scientists call a quasi-moon — an asteroid that orbits the sun but appears to move alongside ...

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

Carnegie Science astronomer Scott S. Sheppard discovered the asteroid on September 27 with the Dark Energy Camera on the ...

Want life? Don't get too close to a gas giant planet. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Like huge playground bullies, planets like ...

Astronomers reported Wednesday the discovery of what could be two planets sharing the same orbit around their star.They said it’s the strongest evidence yet of this bizarre cosmic pairing, long ...

Credit: Shutterstock Astronomers believe they have uncovered evidence of a previously unknown ninth planet lurking in the not ...