The Moon is not a fixed lantern in the sky but a slow-moving partner that is gradually edging away from Earth. That retreat is tiny on human timescales, yet over millions and billions of years it ...

The recently spotted asteroid 2025 PN7 appears to be the source of the rumor mill about Earth's supposed second moon. Earth has several quasi-moons that get their name due to the fact that they ...

With this explosive mechanism, the proto-Earth could have had a longer day of four to six hours and an angular momentum similar to that of the present Earth-moon system. Yet this idea was also ...

New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon, came from closer to the sun. Artist’s impression of the collision between ...