Earth objects, astronomers recently discovered a comet visiting from interstellar space. This is only the third interstellar ...

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

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 — ...