Astronomers have discovered a giant Saturn-sized planet orbiting TOI-6894, the smallest star ever known to host such a world.

In a first, astronomers imaged a baby planet within a gap in the disk of material around a star, confirming predictions about how rings form.

One of the brightest stars in the night sky seems to be orbited by a planet like Jupiter. The news is sure to cheer fans of ...

Cloudbursts are causing chaos in parts of India and Pakistan. Here's what they are The judge who refuses to bend to Trump’s ...

Scientists may have found the first planet ever detected around our closest “solar twin,” a star called Alpha Centauri A, the ...

Planets may begin forming much earlier than scientists once believed during the final stages of a star s birth, not afterward. This bold new model, backed by simulations from researchers at SwRI ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

Astronomers are proposing a new, more quantitative definition of what makes a planet. The new definition looks more directly at the object's mass — but it would still leave Pluto out of the running.

NPR's science podcast Short Wave shares how taking a nap can deliver a eureka moment, a new picture of a planet right after it was born, and how wildfires can affect water quality – after the ...

A distant planet named LTT9779 b reflects 80% of its star's light, making the strange world with metal clouds the biggest known "mirror" in the universe.

Astronomers spotted a potential Earth-size rocky world orbiting a white dwarf, suggesting a future in which our planet outlives its star.

Sean Duffy, the acting administrator of NASA for a little more than a month, has vowed to make the United States great in ...