An interstellar object called 3I/ATLAS is passing through our solar system this year, NASA announced yesterday. Today at 6 p.m. ET, you can see it for yourself, thanks to a livestream from the ...

In 2019, the solar system welcomed its second interstellar guest, Comet 2I/Borisov. These rare encounters offer astronomers an invaluable chance to study material from other star systems.

C.O. Chandler et al. Nearly a month ago, a mysterious object was seen hurtling through the solar system and later confirmed as an interstellar visitor traveling toward the Sun.

From the moment it entered our view, 3I/ATLAS—the third interstellar object ever detected in our solar system—instantly became the biggest news in astronomy for the month, if not the year.

A new image has revealed the clearest glimpse yet of an interstellar visitor zipping through our solar system. The Hubble Telescope and its Wide Field Camera 3 got an incredible view of the comet ...

The largest interstellar comet discovered could be an alien technology. The newly found Manhattan-sized object, named 3I/ATLAS, is approximately 7 miles wide and racing through our solar system.

Back in 2017, Oumuamua, a long, rod-like object, became the first known interstellar object detected in our solar system. Cigar-shaped interstellar object Oumuamua thought to be from Oort cloud.

It’s pure chance that the interstellar comet crossed into our solar system — but it’s not entirely rare, Hopkins said. We just don’t see these visitors most of the time.

Our friend at Atlas seem to have discovered the 3rd interstellar object deep in the milky way. Precovery data going back to June 25th is leaving little doubt. With an eccentricity near 10, this is ...

Harvard astronomer Avi Loeb suggests that if interstellar object 3I/ATLAS isn't a comet, nor an asteroid, it may have been "sent" to us.

Anatomy of an interstellar object Comet 3I/ATLAS follows two other intriguing interstellar objects, called ISOs, that once passed through our solar system: ‘Oumuamua in 2017 and 2I/Borisov in 2019.