Mysterious space object was possible alien probe A mysterious space object spotted by astronomers last fall might have been an alien probe, according to a new paper by Harvard researchers.

Alien spacecraft or interstellar comet 3I/ATLAS biggest revelation has become a major subject of study after NASA’s SPHEREx telescope detected carbon dioxide fog and water ice in its structure.

The astronomers operating the Pan-STARRS1 telescope on the island of Maui were not expecting to hit cosmic paydirt on Oct. 19, 2017—but they did. On what was otherwise an ordinary night of skygazing, ...

Is 3I/Atlas an interstellar alien vessel or simply an intriguing, unique rock hurling through the cosmos? That debate has been raging ever since the comet, only the third known interstellar object to ...