The inner core of the Earth appears to be simultaneously melting and freezing, because of heat circulation in the rocky mantle that covers it.
Hundreds of billions of isolated planets are believed to be floating alone in space, following an international survey of the sky.
Scientists from the Institut Pierre Simon Laplace in Paris say they've confirmed that the Gliese 581d exoplanet could support Earth-like life.
Space shuttle Endeavour is ready to go, says NASA, in what will be its last launch and the second-to-last for any shuttle.
There's a vast ocean of molten magma beneath the surface of Jupiter's moon Io, NASA scientists have found.
Astronomers have observed a massive 'superflare' from the Crab Nebula - but are scratching their heads to try to explain it.
Scientists believe they've worked out why some extrasolar planets orbit in the opposite direction to their star's rotation.
Scientists examining data from the Herschel space observatory say they've detected gigantic storms of molecular gas in the centre of many galaxies.
A mission to sail the seas of Titan is one of three projects shortlisted by NASA for its next Discovery mission.
Space Adventures says it's planning to expand the living space available on its planned tourist trip around the moon.
The world’s first commercial spaceship, Virgin Galactic's SpaceShipTwo, has completed an important test of its reentry ability.
Einstein famously pointed out to an admirer that while a thousand experiments couldn't prove him right, a single one could prove him wrong.
Imagine looking up into the sky and seeing a giant asteroid the size of an aircraft carrier. Scary, eh? But don't worry, because although scientists predict the fly-by will happen this fall, they aren't concerned about a possible collision.
Scientists have created the biggest ever 3D map of the distant universe, using the light from 14,000 supermassive black holes, or quasars, at the centers of galaxies billions of light years away.
The U.S. Department of Energy’s (DOE) National Renewable Energy Laboratory (NREL) is conducting field tests on two electric vehicles in Antarctica to evaluate performance in extremely cold conditions.
A startup company known as Moon Express Inc. has deployed a new app developed by CrowdOptic to give researchers and fanboys an augmented reality experience of shuttle launches.
The launch of space shuttle Endeavour, originally planned for last Friday, will be delayed at least until following the discovery of problems with a heater on a fuel line.
After a 30 year journey, NASA's twin Voyager probes are about to leave the solar system and enter interstellar space.
Astronomers have discovered the densest rocky planet yet. Named 55 Cancri e, it's 60 per cent larger in diameter than Earth but eight times as massive - making it twice as dense as Earth, and almost as dense as lead.
The first stars in the universe may have spun at over a million miles per hour, astronomers at the Leibniz-Institut für Astrophysik Potsdam (AIP) and the Instituto Nazionale di Astrofisica (INAF) say.