For the first time in years, astronomers are seriously talking about adding a new member to the solar system’s planetary ...

Earth has picked up a new traveling companion – an asteroid named 2025 PN7 that now moves through space in step with us. This ...

By measuring iron isotopes in Moon rocks and meteorites, researchers determined Theia probably formed closer to the Sun than ...

In 2006, updated research led to Pluto being controversially demoted to dwarf planet status by the International Astronomical Union. The reasoning was that Pluto's location in the far-flung ...

Scientists have identified three Earth-sized planets orbiting two stars in the TOI-2267 system. Remarkably, planets transit ...

The planet’s long-standing natural “thermostat” is being outpaced by an feedback loop process involving algae, phosphorus, ...

Snapshots from six computer simulations illustrating the distinct tectonic regimes of terrestrial planets, including the newly discovered ...

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

About 4.5 billion years ago, the most momentous event in the history of Earth occurred: a huge celestial body called Theia ...

New research shows that Theia, the planet that collided with Earth and formed the Moon, was a rocky world born closer to the ...