Perihelion for 3I/ATLAS takes place on Oct. 30, when the interstellar interloper will be 1.35 astronomical units (125 million miles, or 202 million kilometers) from the sun. (One

August, scientists using the Very Large Telescope (VLT) in Chile detected the chemical signature of cyanogen gas as the comet reached about three astronomical units from th

Comet 3I/ATLAS nears the sun Oct. 29. Experts say it's natural, despite viral alien theories. Here's how to see it from California.

Captured at the Teide Observatory in Spain's Canary Islands, the composite image was created by stacking 159 separate 50-second exposures.

The orbital eccentricity of Comet 3I/ATLAS is an incredible 6.15, well beyond the threshold of 1 that marks escape from the Sun’s gravity. That single number confirms its status as a visitor from beyond the Solar System-the third such object ever detected after 1I/’Oumuamua and 2I/Borisov.

Astronomers are stunned as interstellar comet 3I/ATLAS erupts early from behind the Sun, releasing a 10,000 km gas jet and speeding ahead of its predicted orbit.

A comet from elsewhere is currently passing through our Solar System while projecting immense plumes of ice and dust toward the Sun. This interstellar object, named 3I/ATLAS, offers astronomers

Comet 3I/ATLAS nears the sun Oct. 29. Experts say it's natural, despite viral alien theories. Here's how to see it from Washington.