The Universe's Most Important Alarm Clock Will Wake Up Rosetta Tomorrow

Two and a half years is a long time to sleep—even for a machine. That's how long Rosetta has slumbered in its decade-long journey towards the comet where it will land. But in the dead of the night, at 2am PST tomorrow morning, Rosetta will awaken. Here's how its alarm clock works. » 1/19/14 12:00pm 1/19/14 12:00pm

How Europe Is Going to Land on a Comet

In November 2014, after traveling 10 years and hundreds of millions of miles, a European spacecraft will touch down on a two-and-a-half-mile-wide ball of ice and dust as it hurtles through space towards the sun. And if all goes according to plan, this unprecedented feat could finally give us what we need to understand… » 12/10/13 3:20pm 12/10/13 3:20pm