Outer space never fails to remind us just how much we don't know. Astronomers have uncovered a lemon-shaped planet that ...

Our sun is about halfway through its life, which means Earth is as well. After a star exhausts its hydrogen nuclear fuel, its diameter expands more than a hundredfold, engulfing any unlucky planets in ...

Planets orbiting two stars at once, a world that sparked debate over the possibility of life, and another being vaporized by ...

When astronomers first cataloged some of the closest orbiting rocky exoplanets, they wrote them off as bare, airless cinders, ...

The exoplanet, dubbed PSR J2322-2650 b, has a helium-and-carbon atmosphere, something researchers say they've never seen ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Astronomers may have uncovered a massive hidden planet far beyond Neptune, using decades-old infrared data. The object’s ...

Scientists say dolphins and orcas have teamed up to hunt salmon off British Columbia. It’s the first time such behavior has been documented between the two mammals.

One side of TOI-561 b is constantly locked towards its star, and the observations showed that this face is very cool for such a closely orbiting planet. A thick atmosphere must be transferring heat ...

Astronomers have discovered a bizarre lemon-shaped exoplanet with extreme heat and a carbon-rich atmosphere, leaving experts unsure how it even formed.

For the first time since Pluto was demoted, the idea of a true ninth planet is edging from speculation toward something ...

January's full Wolf Moon, which is also a supermoon, will rise in the Gemini constellation, appearing bigger and brighter ...