NASA has discovered an interstellar comet that's wandered into our backyard. Luckily, it won't get near enough to be a threat ...

The third object known to have entered the Solar System from interstellar space has an origin unlike either of its ...

For only the third time in history, astronomers have identified what they think is an interstellar object — and it could be ...

These things take millions of years to go from one stellar neighborhood to another, so this thing has likely been traveling ...

Emily Kwong and Regina Barber of NPR's Short Wave talk about a comet visiting from interstellar space, caterpillars that eat and break down plastic, and how animals' sense of smell varies by altitude.

COLUMBUS, Ohio — In a cosmic first for this decade, astronomers have identified a mysterious comet from another galaxy — ...