A Harvard astronomer has proposed a bold theory about a mysterious interstellar object that has been observed accelerating away from our solar system at high speed. This acceleration, he suggests, ...

The yet-to-be-peer-reviewed findings indicate that comet 3I/ATLAS shares similarities with the icy trans-Neptunian objects — ...

Interstellar comet 3I/ATLAS, the third visitor of its kind, has sparked controversy. Explore its hyperbolic orbit, unique ...

Astronomers have discovered that 3I/ATLAS is carrying methanol and other chemicals that were probably important in the origin ...

Analysis of the second confirmed interstellar comet to visit our solar system suggests that the alien body could be covered ...

A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial ...

Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our solar system—only the third ever spotted, though scientists suspect many more may slip past unnoticed. The ...

Last month, the European Space Agency used five of the science instruments attached to its JUICE spacecraft to examine ...

NASA has pointed its fleet of spacecraft at comet 3I/ATLAS to collect new footage of the interstellar invader. The agency has also said "all evidence points to it being a comet." ...

Astronomers measure the speed at which the solar system is hurtling through space by mapping surrounding galaxies and ...

It may be hard to imagine that the dark night sky is a profound astronomical observation. Yet the darkness of the night sky, also known as Olbers Paradox, is one of astronomy’s great puzzles. Four ...