NASA

Nasa scientists looking at carbon-rich meteorites that contain molecules used to make DNA.

Scientist Rhawn Joseph files lawsuit urging Nasa to examine mystery rock more closely.

A recent graphic of Earth released by Nasa shows the intensity of global warming from 1950 to 2013.

Five Nasa Earth science missions to be launched for first time in a decade.

Water is present in the form of vapour which scientists say may have originated from ice-geysers on its surface.

A huge Bizarre Moon base identified on Google Moon Viewer

Unexplained appearance of doughnut-sized rock recorded by Opportunity probe.

Rosetta ready for rendezvous after three years in hibernation.

Scientists examine huge primitive galaxy extending 55,000 light years.

More toxic pollutant to enter food chain as a result of cracking sea ice off Alaskan coast.

Beautiful pictures of intricate galaxies and nebulae captured by Hubble Space Telescope.

X-ray shows fist-shaped cloud of material ejected from exploded star.

Nasa telescope spots tiny faint galaxies from 10 billion years ago.

Quadrantids will be visible on 2 and 3 January in Northern Hemisphere.

Rick Mastracchio and Michael Hopkins float out of International Space Station to replace a pump.

Nasa releases video of sun that presents spectacle of light in all colours emitted by star.

The annual Geminid meteor shower was described as 'perfect' and 'phenomenal' this year.

Water vapour reinforces Europa's position as top candidate for extraterrestrial life, experts say.

Huge fireball lights up night sky above Arizona.

When to watch and what you need to know about the Geminid meteor shower 2013.

Nasa inspector general says Google executives used discounted fuel for six years on their private planes.

Scientists find the coldest place with temperature ranging between minus 92 and minus 94 degrees Celsius.

The best time to watch the showers is pre-dawn hours on the morning of 14 December.

New planet, called HD 106906 b, is 11 times bigger than Jupiter.

Astronomers discover planet 'that shouldn't be there'.

Nasa 'confident' it is seeing water signatures from multiple planets.

Battams says Comet Ison has not survived its close encounter with the Sun.

Latest images boost faint hopes that comet Ison survived close encounter with the sun.

Astronomers hopeful Comet Ison survived perihelion with sun and will survive to light up skies again.

D-Day for astronomers with Comet Ison just hours away from perihelion.