The ESA's Rosetta mission achieved its original goals by landing Philae on the comet and sending data—including amazing photos—back to Earth. However, Philae's landing was bumpy, and the lander wound ...

BERLIN (AP) - How do you land a spacecraft on a comet that is streaking by at 41,000 mph (66,000 kph)? That's a problem scientists have been grappling with for more than a decade as they prepare for ...