Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar System and is ...

Southwest Research Institute (SwRI) scientists are using a solar wind forecasting method combined with analytic and numerical ...

Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming ...

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

Earth and the Moon both record evidence of a 'lost' period of bombardment. (NASA) Tiny crystal grains trapped inside a ...