According to the leading theory of how the Earth-Moon system formed (the Giant Impact Hypothesis), a Mars-sized object (named ...

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

The outer planets of the solar system are swarmed by ice-wrapped moons. Some of these, such as Saturn's moon Enceladus, are ...

The outer planets of the Solar System are swarmed by ice-wrapped moons. Some of these, such as Saturn’s moon Enceladus, are ...

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

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

A nearby binary star system is bereft of giant planets, but scientists think it may still be a decent place to look for life. Binary star system Eta Cassiopeiae, located just 19 light-years away, ...

Maverick astrophysicist Dr Avi Loeb has continued to put forward his claim that 3I/ATLAS looks like more than just a lump of ...

One of the best-timed shots in TV history is an old clip by BBC's science presenter James Burke which has recently become ...

Astronomers have spotted an intriguing cluster of objects in the Kuiper belt, an enormous, donut-shaped region of icy objects ...

Theia impact, with the Sun in the background, illustrating the idea that Theia originated close to the Sun. Image ...

Roughly four and a half billion years ago the planet Theia slammed into Earth, destroying Theia, melting large fractions of ...