"The consequences, should the hypothesis turn out to be correct, could potentially be dire for humanity," said Avi Loeb.

From tracking a rare interstellar visitor to revealing hidden star systems, the SETI Institute is at the forefront of space ...

KENNEDY SPACE CENTER, Fla. - NASA’s Hubble Space Telescope has captured the most detailed image yet of the interstellar comet 3I/ATLAS, which is thought to have originated well outside the Milky Way.

The iceball cometh. As if things didn’t seem apocalyptic enough already, scientists reported that a “horned” comet three times bigger than Mount Everest exploded and is hurtling toward Earth ...

Comet C/2023 A3 (Tsuchinshan-ATLAS) is rapidly approaching its closest approach to the sun, which may be the closest it comes to our planet. The comet will reach its brightest at about 36.4 ...

This diagram provided by NASA/JPL-Caltech shows the trajectory of interstellar comet 3I/ATLAS as it passes through the solar system. Credit: NASA/JPL-Caltech via AP ...

Comet C/2014 UN271, aka Bernardinelli–Bernstein, is already releasing gas, even though it's still far from the sun's heat in the solar system.