A long-standing astronomical puzzle has been solved, as scientists have traced the origin of a mysterious "alien" signal ...

Astronomer and author Kelsey Johnson delves into the significance of exploring existential questions and nurturing curiosity ...

Astronomers found a massive black hole that spent ages in a "quiet" phase when everything around it in the early universe ...

Looking at a distant galaxy means looking back in time.

Behold, the giants! The Hubble Space Telescope has completed a decade of observing Jupiter, Saturn, Uranus and Neptune.

"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners ...