Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

A BOOZY comet has stunned scientists after they discovered the ‘alien’ rock is filled with alcohol. The mysterious interstellar comet is “bursting” with the substance like no other close to Earth.

When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that same hunk of ice starts blasting out enough water to fill 70 Olympic swimming ...

When interstellar comet 3I/ATLAS swept past the Sun in late 2025, something about it had quietly shifted. Researchers trained ...

An interstellar comet changed its chemistry after passing the Sun, revealing hidden layers and a surprising mix of carbon dioxide and water.

ALMA reveals unusual “alien” water in interstellar comet 3I/ATLAS, showing it formed in an extremely cold, distant star ...

This artist’s impression compares the semi-heavy water content of the interstellar comet 3I/ATLAS (left) and Earth (right).

A comet from another solar system has given rise to reports that it is in fact an alien spaceship. The comet – named 3I/ATLAS – was discovered this summer and led to excitement because it appears to ...

Less than a year ago, astronomers discovered a comet soaring through our sky that was not from our solar system. Although we ...

Harvard University professor says encounter could be ‘a blind date of interstellar proportions’ Incoming ‘comet’ could be alien technology and a threat to humanity, says astronomer An interstellar ...

A mysterious interstellar comet older than the Sun is exposing alien chemistry and rewriting astronomy as we know it.