Humanity has already sent five spacecraft on trajectories that will eventually carry them beyond the Solar System, ...

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

The ingredients that help make a planet livable did not necessarily come from where many scientists once thought. A new ...

A new study shows chemical compounds for life on Earth likely came from our inner solar system and not a distant comet or meteor and Jupiter played a part.

Unlike rocky planets such as Mars and Earth, angrites do not have a lot of silicon dioxide. Because of this, astronomers have ...

Alien probes could already be hiding somewhere in our Solar System – and our current surveys are nowhere near good enough to ...

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal interstellar body ...

Astronomers have been given the rare opportunity to study an extrasolar object after the recent discovery of the interstellar comet 3I/ATLAS. Experts tell Live Science how they are planning to observe ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. To us everything seems normal. Our planet, blue and bursting ...