Space.com

NASA is putting the mirrors for its ambitious new James Webb Space Telescope through the ultimate cold test.

A bright hot star with more than 70 times the mass of our sun will live fast and die young.

Astronomy has come a long way in the 401 years since Galileo turned his first primitive telescope to the sky, so it's no surprise we see a very different solar system than the field's earliest pioneers.

A pair of alien planets is locked in an orbital embrace around a dying star, a new study discovered.

The racetrack portion of the $10 million Progressive Insurance Automotive X Prize competition is over.

A trio of planets converging in the night sky this week to give casual skywatchers the perfect chance to see Mars, Venus and Saturn.

The shrinking technology of cell phones, laptops and cameras are now leading to palm-sized satellites.

Hundreds of engineers and technicians working on NASA's space shuttles received layoff notices this week from United Space Alliance.

Like an earthquake in space, so-called spacequakes are temblors in Earth's magnetic field caused by plasma flying off the sun.

A new audio tour in Klingon will guide Trekkers through the spelunking frontier of Australia's Jenolan Caves.

The UK Space Agency has announced it will develop and launch a miniature cube-shaped satellite to be used for inexpensive science missions in low-Earth orbit.

Astrobiology Magazine's Henry Bortman reports from the Pavilion Lake Research Project in British Columbia, Canada where he collected nasty-smelling microbial slime at nearby lakes.

A large asteroid in space that has a remote chance of slamming into to Earth would be more likely to hit the Earth in 2182, if it crashed into our planet at all, a new study suggests.

A giant black hole spouting energy from inside a galaxy is acting like a cosmic magnifying glass, giving astronomers a clear view of an even more distant galaxy behind it.

The huge European satellite Envisat is possible the most dangerous piece of space debris circling the Earth for the next 150 years, experts say.

Two Russian cosmonauts have accidentally lost a tool in space while spacewalking outside the International Space Station early Tuesday.

The next U.S. weather satellite has received its final observing instrument and will begin pre-launch environmental testing in October, NASA announced last week.

New measurements of Neptune's atmosphere from a European space telescope suggest that a comet may have impacted the outer-most planet in our solar system approximately two centuries ago.

Solar sails are gaining popularity and could be tapped to settle an unproven theory by famed scientist Albert Einstein.

Protecting Earth from menacing space rocks that could impact our planet should be designated a top-level NASA strategic goal, according to an agency task force.