Two other things made 'Oumuamua unique. First, it appeared to have a dry, rocky surface, akin to the asteroids known in our solar system. But it also changed its orbit in a way that could not ...

New research suggests that interstellar objects like ‘Oumuamua and Borisov arrive near Earth far more frequently than ...

The solar system could be packed with 1 million alien visitors, space rocks shaken away from our cosmic neighbor Alpha ...

Keep your eye on the ball” is a motto for many athletes—and for astronomers trying to find Earth-threatening space rocks ...

Unfortunately, it’s not currently possible to track ‘Oumuamua down for further study. Its highly eccentric orbit will take it too far for any spacecraft to reach or any telescope to observe.

Oumuamua, as it came to be known ... examining whether material from the nearby star system could make its way to orbit around the Sun. Things are always in motion in space.

The detection of a large interstellar object in 2017 named 'Oumuamua was a landmark discovery. Figuring out where the wayward traveler came from, though, is another challenge entirely, especially ...