In late 2017, a mysterious object tore through our solar system at breakneck speed. Astronomers scrambled to observe the fast ...

Astronomers have confirmed that interstellar objects—cosmic bodies originating from other stars—are passing through our solar ...

A new model has been developed to simulate interstellar activity within our solar system and the nearby Alpha Centauri system ...

Documentary filmmaker Jeremy Corbell spoke with NBC News' Gadi Schwartz about a new video of an unidentified tic tac object ...

"We're trying to encounter an astronomical object that streaks through our solar system just once and we don’t want to miss ...

A British propulsion company is aiming to harness nuclear fusion and drastically cut travel times to far off places in space.

Theoretically, Sunbird's tremendous speeds could cut mission times to Mars in half, from seven to eight months to about four.