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

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

A large radio galaxy study finds our solar system moves faster than theory predicts, raising new questions about how matter ...

To our best of our understanding, the Moon formed from Earth following a colossal impact. A Mars-sized world we nicknamed ...

Funding uncertainties are pushing U.S. space scientists out of the field and putting existing and future space missions on the chopping block.

The object that created the Moon by colliding with the Earth might also have been its neighbour, researchers suggest ...

Interstellar comet 3I/ATLAS sweeps past Mars as NASA’s orbiters and Perseverance reveal fresh clues about its chemistry and ...

NASA is providing more images and information about the interstellar object that's passing through our solar system right now ...

NASA released a trove of never-before-seen images of the interstellar comet 3I/ATLAS, unveiling new characteristics of the ...

The unusual comet—which is to pass Earth again in the coming weeks—is only the third known object to visit us from outside ...

A comet hurtling through the solar system from interstellar space is exactly what it appears to be, NASA officials said Wednesday, moving to quash a wave of online speculation.

An interstellar trespasser known as 3I/ATLAS is almost certainly a comet. So, why do so many people think it's ...