Powerful Alfvén waves have been detected deep inside the sun's atmosphere, possibly explaining why the solar atmosphere is so hot.
In light of the discovery of a fourth moon orbiting Pluto, Mark Thompson ponders what it takes to be called a "planet."
A year after the mission came to an end, the Japanese Hayabusa mission is officially certified by Guinness World Records as the first spacecraft to return to Earth carrying material from an asteroid.
Of the tens of thousands of Near Earth Objects out there, which ones would be best to visit, optimizing fuel and ease of speeding back to Earth should anything go wrong?
The twin Voyager probes are entering interstellar space, but they're experiencing some surprises along the way.
Speaking at the Interlop 2011 conference on Tuesday, Vint Cerf, chief Internet evangelist for Google, discussed ongoing plans for a standardized "Interplanetary Internet."
The dwarf planet has shocked astronomers with its dynamic atmosphere -- previously undetected carbon monoxide has been discovered and it may even have a comet tail-like shape.
What would it be like to survey the Venusian surface firsthand -- to set foot on Earth's strange twin?
Fossilized alien microbes have been discovered in a sample extracted from a meteorite, according to research carried out by a NASA/Marshall Space Flight Center astrobiologist.
The coming solar maximum likely won't be very exciting, and now scientists know why.