Professor Avi Loeb suggests Earth's new quasi-moon, 2025 PN7, might be a relic of the 1960s Soviet space race. His research ...

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

The interstellar comet 3I/ATLAS is barreling toward its closest point to the sun as perihelion looms on Oct. 29. How different will it look when it reappears on the other side?

They have been there for millennia, before the earth was born, taking light years to reach us. For all you know, that shining ...

Over the past seven decades, thousands of sophisticated spacecraft have been launched on ambitious missions to look down on ...

Spaceflight induces motion sickness due to discrepancies between brain expectations and actual gravitational experiences.

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

The discovery of a new celestial object in the Earth's neighborhood has created a buzz online asking whether the planet now ...

Tonight, October 23, 2025, stargazers are in for a rare treat as the waxing crescent moon lines up with Mars and Mercury just ...

The reason people might think Earth has a second moon is due to a celestial body named 2025 PN7 that was spotted in August by ...

The discovery of quasi-moon PN7 has caused a stir on social media. A University of Oregon astronomy professor explains. what ...

The 6%-lit waxing crescent moon will be visible roughly 5 degrees above the horizon as the sun sets on Oct. 23, with Mercury ...