KEY OBSERVATIONS The first alert came quietly. The data did not look wrong—just unfamiliar. What followed has forced ...

Astronomers analyzing the interstellar object known as 3I/ATLAS say new trajectory and composition data point to an origin ...

When an object in space appears to be racing at nineteen times the speed of sound, it instantly jumps from routine data point to global headline. The claim that NASA tracked such a hyperfast visitor ...

An object spotted with help of citizen scientists was moving so fast through the Milky Way that it could escape the gravity of the galaxy and reach intergalactic space, new research has found. Likely ...

When you were five, you probably spotted your best friend running at “a million miles an hour” when they beat everybody at the local athletics meet. You probably haven’t seen anything that fast snice.

Amateur astronomers have spotted a mysterious celestial object that’s traveling at a mind-boggling speed of one million miles per hour. In fact, it’s moving so fast that it’s projected to leave behind ...