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

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.

A possible giant planet far beyond Neptune has never been seen, yet astronomers continue searching for it. Strange movements ...

A discovery that caught the attention of Chinese netizens on Sunday was that astronomers have confirmed an exoplanet named ...

The asteroid that ended the age of dinosaurs may have been far rarer, drier and less sulfur-rich than scientists once thought ...

Astronomers have spent years searching for a possible hidden giant planet far beyond Neptune. Unusual orbits among distant Kuiper Belt objects have fueled the Planet Nine theory, but recent ...

A meteorite that crashed into a New Jersey bedroom in the summer of 2024 may hold a clue to ancient life on Earth.

A new study estimates Mercury's radius may have shrunk by about 3.9 miles (6.3 kilometers) as the planet cooled over billions ...

Voyager 1 is about to set a new record, reaching 1 light-day from Earth, having passed through the heliosphere into ...

And if a car isn’t driven much, is it time-based (change every year) or only when noticeably dirty? A. My experience is that ...

Scientists have uncovered new clues about the giant space rock that slammed into Earth 66 million years ago and triggered one ...

A distant 'exomoon' the size of Jupiter is changing how we think about the cosmos.