Rosetta Space Probe Lands On Comet 67P, Ending 12-Year Mission

In March 2004, the Rosetta space probe launched from Earth as part of a $1 billion European Space Agency (ESA) mission to reach comet 67P/Churyumov–Gerasimenko. Now, over 12 years later—after reaching the comet in 2014 and dropping a small robot, called Philae, on the surface of the comet three months later—the probe has completed its final mission: to land on the surface of the comet it has been orbiting for the past two years.