The U.S. Air Force's X-37B space plane blasted into Earth orbit Wednesday, kicking off the robotic vehicle's clandestine fourth mission — as well as the first flight of a tiny solar-sailing...
A tiny solar-sailing spacecraft will hitch a ride on the rocket that blasts the United States Air Force's X-37B space plane into orbit on its latest mystery mission May 20.
Bill Nye ("The Science Guy") wants you to be a part – and get a part – of a "revolutionary solar sailing spacecraft" mission.
The most daunting leg of Solar Impulse 2’s epic journey around the world will be a massive test of endurance for the solar-powered plane’s pilot Andre Borschberg.
The Solar Impulse 2 plane, about to embark on the most daunting leg of its epic round-the-world journey, is taking renewable energy and clean technology to new heights, says pilot Bertrand Piccard.
NASA has released stunning images of a solar filament bursting out of the sun. The “elongated solar filament,” extended almost half the sun's visible hemisphere, according to NASA, and...
Planets with four suns in their sky may be more common than previously thought, a new study suggests.
Astronauts on the International Space Station caught sight of an amazing solar eclipse March 20, and they have the photos to prove it.
Friday is a huge day for skywatchers, offering a rare trifecta of celestial events – a total solar eclipse, a supermoon, and the vernal equinox.