A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

An interstellar comet carries water unlike anything in our solar system, revealing a far colder birthplace and clues about ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

Newly discovered asteroid 2026 JH2 will safely pass just 90,000 km above Earth on 18 May, offering astronomers a rare and ...

Dark matter is thought to make up most of the matter in the universe, but the only way it interacts with its surroundings is ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A newly brightening comet is now visible in the predawn sky ...

The comet doesn't return for decades, but tonight is one of our two yearly reminders that it's out there!

Comet C/2025 R3 (PanSTARRS) will make its closest approach to Earth on April 26 after surviving a near-Sun encounter that brightened it to naked-eye visibility under dark southern skies. NASA and ...

The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

The Eta Aquarid meteor shower soon will light the sky with debris from Halley’s comet. But a bright moon will spoil the fun ...

NASA's asteroid-bound spacecraft Psyche is headed for an encounter with Mars on Friday (May 15) to get a boost from the Red ...

In a rare cosmic treat and once-in-a-lifetime opportunity, stargazers can spot a vividly bright and rare comet through April 2026 — though the best time Comet PanSTARRS is visible is Friday morning, ...