Discover how scientists have used iron isotopes to determine the likely origin of the Mars-sized planet named Theia.

The Moon is getting 1½ inches (3.8 centimeters) farther away from the Earth every year. Scientists measure the distance to ...

Theia, the world that helped form the Moon, came from the Solar System. Chemical clues in Earth and Moon rocks reveal this ...

Make sure your angles are in units of radians (not degrees), where 2π radians = 360 degrees. But after that you will get the ...

Little is known about the long-destroyed moon-forming planet, Theia. But it may have been born in the inner solar system—just like Earth—a new study suggests ...

A video showing what appears to be two moons in Michigan has raised questions online, but astronomers say the sight has no ...

New research suggests Earth's Moon formed from the catastrophic collision of our planet with its \"sister\" planet, Theia, born nearby. This \"sibling\" p ...

About 4.5 billion years ago, a colossal impact between the young Earth and a mysterious planetary body called Theia changed everything—reshaping Earth, forming the Moon, and scattering clues across ...

Scientists traced the Moon's parent planet Theia to the inner Solar System, solving a 4.5-billion-year mystery.

Simulations suggest 2022 RD2 could slip into a temporary orbit around Earth between 2043 and 2044, becoming a mini moon for ...

The last supermoon of 2025, known as the Cold Moon, is set to light up December skies with its increased size and brightness.

It’s all about our nearest neighbour in space this week as the Moon is not only full but also, as with October and November, a supermoon.