The comet should be visible by telescope through September, before it gets too close to the sun, and reappear in December on ...

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...

The newly discovered interstellar visitor is just the third of its kind and fascinates astronomers who hope to learn from it ...

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.

Dubbed 3I/ATLAS, the comet poses no danger to Earth and will remain roughly 150 million miles away as it speeds by.

All eyes are on Comet 3I/Atlas as astronomers worldwide chase the exotic ice ball through our solar system ...

A new interstellar object, A11pl3Z, has been discovered in our solar system, marking the third such object to be observed. It was first discovered zipping near the sun this fall.