Astronomers have revised the mass of nearby exoplanet GJ 3378 b, recasting it as a rocky super‑Earth in the habitable zone ...

The incident, reportedly over a nuclear weapons assembly plant, was included in the Pentagon’s fourth tranche of UFO files.

Interstellar asteroid Oumuamua arriving from Pleiades star cluster. Oumuamua 3D model: Credit: ESO/M. Kornmesse According to NASA, ‘Oumuamua is the first known interstellar object to visit our solar ...

A Soviet astronomer in the 1960s proposed a scale to classify hypothetical alien civilizations. Here’s why the framework is ...

Project Hail Mary, Solaris, and The Hitchhiker's Guide to the Galaxy are all among the very best sci-fi books set in space.

With new technologies come new opportunities. And that is especially true in astronomy—with every new advanced telescope, we ...

A comet screaming in from another star system carried alien ice ratios never seen before. What scientists found inside its spinning nucleus is reshaping how we picture worlds beyond our sun.

In July 2025, astronomers spotted something remarkable passing through our Solar System, an object that had not come from ...

In the book version of “Project Hail Mary,” author Andy Weir, known for grounding his fiction in plausible science, describes ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

Based on evidence collected by the James Webb Space Telescope, researchers have found that interstellar comet 3I/ATLAS could be up to 12 billion years old! Alien comet 3I/ATLAS wowed us as it passed ...

PARIS – An interstellar comet that blazed past the Sun in 2025 could be nearly three times older than our solar system and is unlike anything ever before seen in our cosmic backyard, astronomers said ...