Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial ...

Astronomers measure the speed at which the solar system is hurtling through space by mapping surrounding galaxies and ...

New measurements of radio galaxies reveal that the solar system is racing through the universe at over three times the speed ...

Space has a knack for bending our sense of scale. The Moon feels close enough to touch—after all, we see its craters with ...

Apollo samples provide evidence: Researchers analyzed Moon rocks brought back by the Apollo missions and, for the first time, ...

Astronomers have uncovered a unique exoplanet system, revealing a surprising and rare pattern among its planets. The ...

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

Astronomers say they've discovered water vapor near an old star with a planet-creating disk. No planets were found to be forming near its inner disk. Astronomers have published findings after ...

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is extremely ...

Mercury is the innermost and smallest of the eight major planets in our Solar System, orbiting closest to the Sun. Though ...

Super-Earths and sub-Neptunes, planets with sizes between Earth and Neptune, constitute approximately one-third of known exoplanets but are absent in our solar system. Their prevalence elsewhere and ...

Artist impression of the four classes of planetary system architecture. A new architecture framework allows researchers to study an entire planetary system at the systems level. If the small planets ...