An object dubbed 3I/ATLAS is only the third interloper from outside the Solar System seen in all of human history.

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The monstrous 85-mile-wide comet C/2014 UN271 is the second most distant body originating from the Oort Cloud found to be ...

Can we really reach another solar system? This video explores how humanity might colonize Proxima Centauri B, our closest potentially habitable exoplanet, located in the Alpha Centauri system. We ...

To reach Earth’s closest star system, Alpha Centauri, scientists are building a laser-powered spacecraft. To pull off ...

A new interstellar object has been spotted careening into the solar system at an extremely unusual, hyperbolic trajectory. If its interstellar origins were to be confirmed, it'd only be the third of ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

Mercury is the month's highlight, reaching greatest elongation July 4. Also on show in the Southern Hemisphere: Mars, Saturn, ...

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...

For millennia, the way we found our way home has been using the stars. The tech we have sent towards those stars also uses ...