In 1995, a pair of scientists discovered a planet outside our solar system orbiting a solar-type star. Since that ...

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 ...

European astronomers report the discovery of a second alien world in the TOI-1422 planetary system located some 500 light ...

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

"Over time, the rays will darken to the shade of the surrounding regolith as the material is exposed to space weathering," ...

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

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

Scientists have identified three Earth-sized planets orbiting two stars in the TOI-2267 system. Remarkably, planets transit around both stars — a first in astronomy. The system’s compact, cold nature ...

A new extinct flying reptile species has been discovered in fossilized dinosaur vomit. Known as "regurgitalite," the remains ...

Coloe Fossae was shaped by powerful tectonics, which stretched and cracked Mars's crust, causing chunks of ground to collapse ...

Deep within Earth’s mantle, scientists have uncovered surprising evidence that traces of the planet’s early form,proto-Earth, ...

The study suggests that planets closest to their stars, especially those that orbit their stars in just 12 days or less, are at a higher risk of being sent to their doom by their aging suns.