Harvard researcher Avi Loeb says comet 3I/ATLAS weighs 33 billion tons and spans 3.1 miles, making it far larger than previous interstellar visitors.

Comet C/2025 R2 (SWAN) was discovered on Sept. 11 by amateur astronomer Vladimir Bezugly in images from NASA's Solar and Heliospheric Observatory (SOHO). It is currently about 50 million miles from ...

NASA is tracking an object that is entering the solar system at approximately 245,000 km/h. This interstellar visitor is 3I/ATLAS, also known as “Comet C/2025 N1 and initially ...

Watch Comet 96P/Macholz brighten as it flies by the sun in these time-lapses captured by the ESA/NASA Solar and Heliospheric Observatory (SOHO) and Solar and Terrestrial Relations Observatory (STEREO) ...

I/Atlas comet, which is 40 times brighter at present, will reportedly be struck by a CME released on September 19, 2025.

A comet speeding towards the inner solar system, where Earth is located, is significantly bigger than initially thought, astronomers said. The comet named 3I/ATLAS likely weighs more than 33 billion ...

I/ATLAS, the mysterious interstellar object long suspected to be alien tech, has survived a direct hit from a massive solar eruption.