Europe's Rosetta Spacecraft Marks 2 Years Orbiting Comet (Video)

Europe's history-making Rosetta spacecraft has now been circling its comet companion for two years. On Aug. 5, 2014, Rosetta became the first spacecraft ever to orbit a comet when it arrived at an icy wanderer known as 67P/Churyumov-Gerasimenko. Rosetta has observed Comet 67P in a number of ways from a variety of different vantage points over the past 24 months, as you can see in this video animation.