Avi Loeb said bases this hypothesis on a July 21 image captured by the Hubble Space Telescope and shared by NASA.

In the past decade, astronomers have witnessed three interstellar objects (ISOs) passing through the solar system. These ...

An interstellar comet spotted by NASA is headed for our solar system, showing up near Earth later this year, but it's another ...

Harvard astrophysicist Avi Loeb has cowritten a research paper speculating whether the comet 3I/ATLAS is in fact "hostile" ...

Of course, 3I/ATLAS is no ordinary comet. Discovered on July 1, 2025 by the Asteroid Terrestrial-impact Last Alert System ...

NASA's Hubble Space Telescope got an up-close look at a headline-grabbing object known as 3I/ATLAS that has wandered into Earth's cosmic neighborhood.

Hubble has taken the clearest image to date of the interstellar comet 3I/ATLAS, which is racing through our solar system at ...

The latest observations of 3I/ATLAS suggest it resembles comets from the outer reaches of our solar system, but may be ...

Astronomers have spotted only three objects known to have come from outside our solar system. The newest, called 3I/ATLAS, is ...

Learn about the interstellar comet 3I/ATLAS, a high-velocity visitor from another star system. Learn how NASA is tracking its ...

Avi Loeb, the Harvard theoretical physicist who has drawn attention for suggesting comet 3I/ATLAS may be alien-made, is sharing a new thought: The interstellar object could be nuclear-powered, based ...

Scientists are exploring various proposals to repurpose existing spacecraft in order to chase after the interstellar object ...