As the sun reawakens from an anomalously quiet period, keep track of solar flares, sunspots and coronal mass ejections with a new iPhone app that puts the real-time status of the sun in your hand.
“This …

Small robots the size of riding mowers could prepare a safe landing site for NASA’s Moon outpost, according to a NASA-sponsored study prepared by Astrobotic Technology Inc. with technical assistance from Carnegie Mellon University’s Robotics …

“The world changed today. What I say or do is very minor compared to the significance of what happened to our country today when it was attacked.” So said Expedition 3 Commander Frank L. Culbertson, …