To see the planet's blue-green hue, which is caused by the absorption of sunlight from methane gas, you'll need a small ...

The Red Planet and the moon visit the Cancer constellation, the Crab. The moon and Mars will share a close approach in the ...

Ever since William Herschel discovered Uranus in 1781, astronomers have been eager to find new planets on the outer edge of ...

GSAT-N2's launch was the third for SpaceX in less than a day. The company launched a satellite for the Australian telecom ...

An international team led by researchers in Japan and Europe has discovered a new multi-planet system around a sun-like star, ...

The planet's axis tilts away from the sun, which lights the bottom of its rings. But twice in its orbit, Saturn experiences ...

On 1971, Mariner 9 became the first spacecraft to orbit Mars. At the time, scientists didn't know much about the Red Planet.

Joel Achenbach writes about science and politics for The Washington Post's National desk. He has been a staff writer for The Post since 1990. He started the newsroom’s first online column, Rough ...

WASHINGTON (AP) — Donald Trump will return to the White House accompanied by a crew of longtime friends and aides as well as newfound, splashy allies. The Republican president-elect has barely ...

"Its orbit would be very distant ... of Planetary Sciences at Kindai University in Japan and co-author of the study, said. The search for Planet Nine has been on since 2014 when Konstantin Batygin and ...

Planet Nine is thought to orbit the sun once every 10,000 to 20,000 years. Its existence has not been confirmed, but its gravitational influence may explain the strange clustering of distant ...

Astronomers search for a hidden ninth planet beyond Neptune's orbit Gravitational anomalies suggest presence of Planet Nine in Kuiper Belt New telescope technology may soon confirm existence of Planet ...