Solar System

"For years, he had the field of planetary formation, which he had created, virtually to himself. Most Soviet colleagues were skeptical and uninterested; his research appeared so speculative, so far removed from any evidence."

NASA will extend the New Horizons mission through 2028 or 2029, allowing the spacecraft to continue studying its exotic environs far from the sun.

A new class of proteins found in methane deposits on Earth's seafloor could help inform the search for alien life.

This year's final supermoon, September's Harvest Full Moon, rises on Friday, Sept. 29, bringing a summer of supermoons to a close and joined by a planetary parade of Jupiter, Saturn, and Mercury.

The return capsule of NASA's OSIRIS-REx mission is scheduled to touch down in Utah on Sept. 24, bearing samples of asteroid Bennu. Here's how to watch the event live.

The outer solar system contains a striking crime scene with a big mystery: How did Neptune get a moon like Triton?

A hypothetical Kuiper Belt Planet adds to the list of possibly undiscovered worlds in our solar system. Also on that list? Planet Nine.

Venus is approaching 'inferior conjunction' as it swaps from being the 'Evening Star' to the 'Morning Star,' passing between Earth and the sun in the meantime.

Swapna Krishna, author of the new book "Stargazing: Contemplating the Cosmos to Find Inner Peace," writes a guide to getting the most out of the night sky wherever you are.

Comet C/2022 E3 made a close pass by our planet in January, and a new video captures its incredible journey in 4K resolution.

The velocity of interstellar objects passing through our solar system, like 'Oumuamua, can be correlated to their chemistry and the type of star they came from.

A new video shows off the sun's incredible power. A 'solar tornado' erupted from the surface in April, and you can watch it in 4K resolution.

New observations of the sun have revealed never-before-seen meteor-like fireballs raining down as shooting stars on the surface of the sun.

A supernova that erupted when a massive star died could have destroyed our infant solar system — if it weren't protected by a cocoon of molecular gas.

The cold and mysterious Oort cloud at the edge of our solar system may be hiding a rogue exoplanet, new research suggests.

The core of Jupiter's ocean moon Europa might have formed billions of years after the rest of it did, if indeed it has formed at all, a new study finds.

Saturn is once again the solar system's "moon king," snatching the crown back from Jupiter after the discovery of 62 new moons. Saturn now has a whopping 145 known satellites.

The action 12,000 light-years away may presage what happens to Earth about 5 billion years from now.

The dark skies of the new moon will offer skywatchers the chance to spot Ceres tonight (March 21), as the dwarf planet reaches opposition.