The Nasa flying saucer is aimed at inspiring future human expeditions to Mars.
Nasa transmitted the message using its Opals technology.
Nasa's solar observation satellite has observed a coronal mass ejection, or CME, surging off side of sun.
The SpaceX Dragon V2 spacecraft is capable of delivering up to seven astronauts to the International Space Station
Nasa's Ellen Stofan wants to sail boat on surface of Titan, but project will take until 2040.
Nasa astronomers observing galaxy from Spitzer Space Telescope observe shadows in cosmic cloud of gas and dust
Three volunteers have spent 105 days living in a 500 cubic-metre module cultivating plants to feed themselves.
Jupiter's Giant Red Spot has shrunk to smallest size ever measured, Nasa confirms.
Keen UFO watcher Scott Waring has spotted a UFO orbiting Mars in Curiosity Rover photographs.
Nasa astronauts start training for mission similar to storyline of Hollywood blockbuster
Space agency to send seedlings to moon in 2015 as first stage of plans for Martian greenhouse
A Nasa scientist believes that the answer to saving planet earth is not environmentalism but orbiting solar power stations and mining asteroids.
Meteor shower peaking on 23 and 24 May has potential to produce 1,000 meteors per hour
Nasa has supplied a portable plant growth unit to ISS to grow lettuce for astronauts on board.
See the world spin in HD by tuning into the High Definition Earth Viewing (HDEV) experiment aboard ISS.
Scientists have discovered a young galaxy that exhibits features like more developed galaxies.
Landscape in Idaho has strong resemblance to amphitheatre canyons of Mars.
Spitzer and Wise telescopes locate coldest brown dwarf star-like body nearest our solar system
18th-century astronomer Charles Messier thought that it was a nebula, but Messier 5 is actually an ancient star cluster
Space agency joins start-up firm to launch educational toy for children
It promises to cure diseases, explore space and vastly improve artificial intelligence - but just what is quantum computing?
Nasa satellite images show large-scale decline in greenness of Africa's Congo rainforest.