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Kepler satellite: astronomers may have discovered 461 new planets

Astronomers have found possible evidence for 461 new planets outside our solar system, using measurements from Nasa's planet-hunting satellite, Kepler.<p>The data has also been used by scientists to predict that the Milky Way could contain up to 17bn Earth-sized planets orbiting stars.<p>Several of the …

High-resolution Nasa images show magnetic braids of the sun - video

Nasa images of the sun's outer atmosphere, the highest resolution pictures ever achieved. The agency launched the High Resolution Coronal Imager, or Hi-C, on 11 July 2012 from White Sands missile range in New Mexico. Hi-C's image sequences show the twisting up or braiding of the magnetic field that …

Iran launches a monkey into space – and fires warning about its ambitions

Iran joined the international dash for space in earnest on Monday when it claimed to have successfully launched a live monkey into space in an Iranian-built space capsule.<p>Iranian media reported (video) that the country's space agency had sent the creature 75 miles (120 km) above the Earth in a …

How big is the universe … compared with a grain of sand? - video

Scientist praises socialist philosopher under attack from senator Joseph McCarthy in letters written in 1954<p>Published: 1 Mar 2013<p><b>Stephen Curry:</b> Wonders of Life is the amazing story of the physics of living things, but underneath there is a harder and more complex tale to tell<p>Published: 18 Feb …

Nasa Curiosity rover tests suggest life may have existed on Mars

An ancient network of rivers on Mars once made parts of the planet habitable for microbial life, according to the latest analysis from Nasa's Curiosity rover.<p>Rock dust drilled from sediments in the giant Gale crater on the red planet were found to contain clay minerals that can have formed only in …

Animal astronauts: the unsung heroes of space exploration

From intrepid turtles to pioneering jellyfish, a host of animals have made their mark as the unsung heroes of space exploration.<p>Early animal astronauts were used to test the effects of zero gravity and extreme pressure on the body, and their modern-day counterparts are used in experiments on board …

Mars Curiosity rover to continue roving after technical glitch

Nasa engineers have overcome a computer glitch that shut down the space agency's car-sized Mars rover, Curiosity, earlier this week.<p>The $2.5bn rover went into a precautionary "safe mode" on Sunday, when a command file failed a check by protective software on board the mobile science …

Mission to the Mars Desert Research Station in Utah – in pictures

Photojournalist Jim Urquhart always wanted to go into space. Here he comes close to his dream, documenting a team of scientists who are using the Utah desert as a dry run for future missions to Mars