The discovery boosts the chances of finding extraterrestrial life.

Astronomers have discovered a faint new world orbiting a young star after more than a decade of cosmic hide-and-seek.

A planet 48 light-years away is leaking helium from its upper atmosphere, a discovery that’s gotten astronomers excited. The ...

A star located about 1,300 light-years from Earth shows signs of having devoured one of its planets — and is now gearing up ...

It’s the first potentially habitable world known to host an atmosphere, making it a lead contender in the search for life ...

A rocky world orbiting within its star’s habitable zone may be surrounded by a helium-rich atmosphere, providing the ...

WD 1856 b is the only confirmed case of a planet that survived the death of a Sun-like star. It’s a Jupiter-size world ...

A rocky planet about 49 light-years from Earth appears to have held onto an atmosphere, despite orbiting a red dwarf capable ...

Mercury is due to join Venus and Jupiter in the night sky for an uncommon celestial event commonly known as a planet parade. Here's how to catch it.

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...