The European Space Agency's Rosetta probe is awake after a long sleep as it traveled through our solar system on its way to land on a comet later this year. The probe will park itself in orbit around Comet 67P/Churyumov-Gerasimenko this August and will drop a probe to the surface in November. Rosetta started its journey in 2004 and for the past two years has been shut down to save power. Now that it's awake again it has started Tweeting and will continue to do so throughout its mission. This will be the first time humans have landed a craft on a comet, and thanks to Twitter we can all follow along as it happens.
Check It Out: Rosetta Probe Tweets its way Through Space