It's something the etiquette books don't tell you, and Google Translate's not much better either: how do you talk to aliens?
Lasers could be used to deflect asteroids on potential collision courses with Earth, according to a new study.
A massive scar that appeared in Jupiter's atmosphere last summer was caused by an asteroid 'the size of the Titanic', says NASA.
The world's first space weather forecasting system is about to go into operation.
To the delight of NASA engineers, the NanoSail-D nanosatellite has unfurled its 100-square-foot polymer sail in low-Earth orbit and is operating as planned after a month of inactivity.
The words "UFO convention" may conjure up images of aliens, Area 51, and fringe vests, but what about business professionals and politicians?
After 230 days in isolation, an international team is about to 'land' on Mars.
The second of two massive spy satellite launches took place yesterday from the Vandenburg Air Force Base in California, carrying a classified satellite for the National Reconnaissance Office (NRO).
NASA is pressing ahead, its fingers crossed, for a third and final shuttle flight this year.
Many types of asteroid could have created the kind of amino acids used by life on Earth to build proteins and regulate chemical reactions, according to new NASA research.
Astronomers have measured the most massive known black hole in our cosmic neighborhood, weighing in at the equivalent of 6.6 billion suns.
The Crab Nebula - long thought to be the most stable source of high energy radiation in the sky - has astonished astronomers by showing signs of dimming.
A California researcher is urging NASA to (seriously) study the effects of space on human sexual behavior and procreation.
Astronomers at NASA are peering ever further away into the universe, and have now discovered their most distant galaxy yet.
Well, that's our vacation sorted: Space Adventures says it has three seats for sale for 2013 flights to the International Space Station.
Hubble scientists have released a picture of a strange green blob floating near a neighboring spiral galaxy.
The European Space Agency has released the fist results from its Planck mission, focusing on the coldest objects in the universe.
Scientists have for the first time discovered that antimatter is regularly being produced on Earth - by thunderstorms.
Astronomers have been astonished to find a supermassive black hole in the center of a tiny low-mass galaxy, suggesting that such black holes can form before their host galaxies.
Astronomers have found the smallest planet yet outside our solar system, a rocky planet about one and a half times the size of Earth.