 The European Space Agency's historic Rosetta mission to the Comet 67P has concluded with a controlled impact into the comet. The decision to end the mission was based on the inevitable. The Rosetta spacecraft was running out of power. Here's the collision course into the comet from an altitude of around 19 kilometers. Rosetta targeted a region on the small lobe of the comet close to a region of active pits. Pits are of particular interest because they play an important role in a comet's activity. Transmissions continued up to the moment of impact. The comet is now beyond the orbit of Jupiter and heading for the Kuiper Belt. It will return with Rosetta's wreckage on board in 2021.