Far beyond Neptune, strange orbital patterns suggest the Solar System may still contain a massive unseen planet. Planet 9 ...

For decades, Uranus, Neptune, and Pluto remained distant worlds wrapped in mystery, their true nature hidden beyond the reach ...

For obvious reasons, the Sun’s influence weakens as you get closer to the edge of the solar system. But things might be a lot more complicated than we previously thought, according to a new study.

The asteroid that wiped out the dinosaurs was likely an exceptionally rare CO chondrite from a distant region of the solar system. Its unusual chemistry suggests that planet-cooling dust and debris, ...

The new goal of the revamped program was to study the outer solar system and the interstellar medium beyond the sun’s ...

In the latest research, telescope observations of 3I/ATLAS examine its chemical structure and suggest that it took shape in a peripheral region of a relatively calm planetary system ...

NASA's record-breaking New Horizons spacecraft has awoken from a 321-day hibernation in "good health" as it resumes unprecedented science at the solar system's edge.

Researchers probe the geochemistry of the moon, Mars, asteroids, and water worlds to understand our home and plan for future space missions ...

The probe is set to become the third human-made object to leave the solar system, but it must first cross this mysterious boundary.

A rare CO chondrite meteorite was the probable impacter that struck Earth 66 million years ago, wiping out 75% of Earth's ...

A speculative paper argues that ancient planetary flybys may have helped trigger some of Earth’s mass extinctions.

Solar Orbiter is a unique watch winder created by Martin Smith and Laikingland to mark the 15th anniversary of MB&F's M.A.D.