To the Edge of the Solar System! The Truth About Pluto and the Outer Reaches Revealed by the New Horizons ProbeLaunched in ...

The Solar System is far messier than the neat diagrams most people learned at school: Mercury is Earth’s closest planet on ...

A look at Pluto’s heart-shaped surface feature and why it’s considered the largest heart in the solar system.

This month brings a new way to see remote planets, a spacecraft idea for scouting resources across the Solar System, fresh clues about the way planets form, and even a surprise from Pluto.

Thousands of planets have been discovered beyond our solar system, offering clues to where life might thrive and whether ...

What do we expect from a hero's 'first words'?When a hero achieves a historic feat, we cannot help but expect their 'first ...

A TNO is classified as any minor planet — an astronomical object in direct orbit around the sun that is exclusively ...

The Hubble Space Telescope's best images of the planets and other celestial bodies of our Solar System ...

Scientists have found the first evidence that liquid may have flowed across Pluto’s surface in the recent past. Dark features on the enormous Sputnik Planitia glacier appear consistent with liquid ...

Twenty years after Pluto lost its planetary status, the debate continues as scientists still disagree over what defines a planet.

In a new study, astronomers detail observations of what could be the first known exosatellite - a natural object orbiting a ...

Pluto’s hazy, multilayered atmosphere is thinning out as it enters the coldest part of the Plutonian year. Above, the ...