NASA has discovered a mysterious interstellar comet entering our solar system. Learn what this strange visitor is and how scientists are tracking it now.

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

NASA’s New Horizons spacecraft has successfully demonstrated a revolutionary method for deep space navigation, as the probe ...

NASA's New Horizons spacecraft has successfully conducted the first-ever deep space stellar navigation test, while traversing the Kuiper Belt.

Astronomers are monitoring an object headed our way that may have wandered over from another star system. Scientists have ...

Astronomers have confirmed that a recently spotted object is an interstellar visitor, and appears to have come from the ...

On July 1, the ATLAS (Asteroid Terrestrial-impact Last Alert System) survey telescope reported the discovery of A11pl3Z, an ...

This emission is strongest under conditions which are intermediate between those in the interior of nebula and those in the dense cloud.