NASA

Four veteran astronauts were chosen to work with the two companies on their trips to the International Space Station.

Nasa's New Horizons spacecraft reveals closest image of dwarf planet Pluto with a big heart-shaped area.

'We know that on Earth opals like these are often formed in and around hot springs.'

US Air Force and Department of Defense want Mach 5 planes that are twice as fast as Concorde.

The minor glitch led to the loss of a mere 1% observations.

'Although we have only detected five the predicted numbers are huge'

Nasa says it may take days to restore the probe to its original flight path.

Three crew members manning the International Space Station (ISS) awaiting urgent supplies of fuel, oxygen, food and equipment.

Supernova the size of the city to meet one of the brightest stars in the galaxy.

Quantum dot spectrometers in smartphones could diagnose skin diseases and track vital signs.

Nasa's mission to Mars is just the first step towards making humanity a multi-planet species.

1,000 qubit processor calculates more possibilities than there are particles in the universe.

Unmanned Dragon cargo ship disintegrates 2 minutes into flight and falls into ocean.

NASA scientist talks about pyramid spotted on Mars.

Extraterrestrial hunters claim to have found a structure very similar to an Egyptian pyramid in Nasa images of Mars.

'The popular conception of asteroids is that they are going to kill us all, and it's just not true'

New Nasa initiative hopes to 'transform aviation as we know it' through electric plane development.

The nuclear explosives will be set off by a craft ramming into the object.

Charles Frank Bolden Jr., the Administrator of Nasa, said he believes there is life beyond Earth.

'The availability of methane and hydrogen is critical to the potential of the Martian crust as a habitat'

Watch live stream of 2015 Astrobiology Science Conference in Chicago online.