Around half the 44 trillion watts of heat that flows from the interior of the Earth is the remaining heat from the planet's creation.
Today, after a four-year journey, NASA's Dawn spacecraft will go into orbit around the asteroid Vesta, where it will stay and make observations for a year.
Well, I suppose it could be worse. Yes, the crew of the International Space Station (ISS) could be running from Aliens and Predators, or trying to shut down an insane (Windows?) computer intent on killing every astronaut.
NASA is feeling the pressure as Congress demands a finalized design for a heavy-lift rocket that will be used to launch future manned space missions.
It's exactly one year since Neptune was discovered - one Neptunian year, or 165 of our own rather shorter ones.
Watch out gas station attendants, NASA is now experimenting with a Robotic Refueling Mission experiment that will provide refueling and minor repairs to spacecraft already in orbit.
In light of last week's final NASA space shuttle launch, Beijing is stepping up to the plate with aspirations of exploring the Moon, Venus and Mars.
Some scraps and trimmings from the flag planted on the moon by Neil Armstrong in 1969 failed to sell at auction over the weekend, despite having been described as the 'ultimate' piece of space memorabilia.
John F. Kennedy, the 35th President of the United States, once famously declared that "no nation which expects to be the leader of other nations can expect to stay behind in this race for space."
The House Appropriations Committee has proposed scrapping the James Webb Space Telescope, the successor to Hubble and the flagship project of US astronomy.
NASA scientists have captured both the sight and sounds of a storm on Saturn that covers eight times the surface area of Earth.
Hydrogen peroxide has been found for the first time in space, and astronomers are excited - not because it indicates that aliens are bottle blondes, but because it gives clues to how water may be formed.
ESA has recovered a crucial science package on its Cluster mission, using a series of commands invented for the occasion.
NASA's given the green light to the July 8 launch of its last-ever shuttle mission.
Are we alone in the universe? Russian scientists don’t think so.
A house-sized asteroid is set to miss Earth by a whisker later today, passing just 7,600 miles above the surface.
Sure, it’s easy to misplace your stapler, but what about a tiny piece of transparent tape covered in moon dust brought back with the Apollo 11 astronauts!?
Our sun and its inner planets may not have formed from the same materials, as previously thought, samples returned by NASA’s Genesis mission indicate.
The Cassini spacecraft's found the strongest evidence yet that Saturn's moon Enceladus is concealing a large, underground saltwater ocean - raising hopes for the possibility of life on similar moons.
Astronomers are studying what they decribe as one of the most complex and dramatic collisions between galaxy clusters ever seen, and which has taken 350 million years to play out.