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 ...

NASA is tracking an object that is entering the solar system at approximately 245,000 km/h. This interstellar visitor is ...

Watch Comet 96P/Macholz brighten as it flies by the sun in these time-lapses captured by the ESA/NASA Solar and Heliospheric ...

Comet C/2025 R2 (SWAN) is a new visitor from our outer solar system. It may be easier to see as it approaches Earth next week ...

The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously thought, astronomers say.

A supermoon will hang in the night sky bigger and brighter than usual during its perigee, and a great time to head outside to ...

Comet 3I/ATLAS, the third interstellar object ever detected, will be visible from ground-based telescopes through the end of ...

The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously thought, astronomers say. A comet named 3I/ATLAS likely weighs more than 33 ...

The National Aeronautics and Space Administration has confirmed an interstellar object is passing through our solar system.

In July, NASA reported its ATLAS (Asteroid Terrestrial-impact Last Alert System) survey telescope in Chile identified a comet ...