Interstellar comet 3I/ATLAS, a visitor older than the Sun, has stunned scientists with a colossal, puzzling X-ray cloud larger than the Earth-Moon distance. Why does this alien object glow?

As the interstellar comet 3I/ATLAS races toward its closest pass by our planet, astronomers are fixated on a peculiar feature ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Astronomers thought they had seen the "first hints of life on an alien world" this year, but they disappeared under closer ...

The impressive footage was captured by Mark Johnston from his backyard in Scottsdale, Arizona. Credit: Mark Johnston Music: A ...

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

Hawaii’s Gemini North telescope has captured new images of interstellar comet 3I/ATLAS with a green glow as it remerges from ...

"Ultimately, this work may help scientists better predict the impact of space weather across the solar system on longer ...

For the first time, scientists have created detailed, 2D maps of the sun's outermost atmosphere. This feat was accomplished ...

3I/ATLAS has now made its closest approach to the sun and Earth and is now heading back out toward the outer solar system. On ...

Using JWST, scientists discovered PSR J2322-2650b — a carbon-rich, lemon-shaped exoplanet orbiting a pulsar — challenging ...

Scientists in Boulder are using existing NASA spacecraft to track a rare interstellar comet called 31/ATLAS as it travels through Earth’s solar system.