In November, SETI Institute researchers contributed expert perspective to media stories on interstellar comet 3I/ATLAS and ...

ATLAS is back on the map. Contrary to claims that 3I/ATLAS is no longer from Earth, space experts claim that the Manhattan-sized comet can now be captured by anyone with basic viewing equipment.

Comet 3I/ATLAS makes closest approach to Earth, 170 million miles away, offering rare insights into interstellar space and ...

From an interstellar comet to breathtaking auroras and from brand-new rockets to iconic space telescopes, here are some of our favorite images from the cosmos in 2025 ...

The Royal Observatory Greenwich has announced the winners of its ZWO Astronomy Photographer of the Year contest. This annual showcase highlights some of the world's best space photography, with ...

Spotting Earth-like planets is nearly impossible with conventional telescopes, but researchers propose a bold fix: a rectangular design that can separate a planet’s faint glow from its blinding star.

Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as close to Earth as ever.