CAPE CANAVERAL, Fla. (AP) — A Soviet-era spacecraft meant to land on Venus in the 1970s is expected to soon plunge ...

McClain, an Army colonel and helicopter pilot, should have taken part in the first all-female spacewalk in 2019, but there ...

Vesta, thought to be the second-largest asteroid in the solar system, could be a piece of an ancient, unknown planet, a new study hints.

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

An international team including astronomers from the Center for Astrophysics | Harvard & Smithsonian (CfA) has announced the ...

Serving nine UC campuses and two national laboratories, Lick Observatory continues to be at the forefront of groundbreaking ...

MIT astronomers estimate a planet 140 light-years from Earth may disintegrate fully within the next 1 to 2 million years.

Earth Day is on Tuesday, April 22, this year. The annual observation is set aside to increase awareness around environmental ...

Jupiter is the largest planet in the solar system. It's about 11 times wider than Earth with an equatorial diameter of 88,846 ...

Mars is about 140 million miles from our cozy planet. A human mission to that cold, rocky neighbor would mean being away from Earth for about 3 years. But the things those explorers would see and ...

Astronomers have found possible chemical signs of life on a distant planet outside our solar system, though they caution more work is needed to confirm their findings. The research, led by ...