New Horizons flies past Jupiter at a speed of 20 kilometers per second. The space probe photographs volcanic eruptions on Jupiter’s moon Io, maps cloud swirls in the giant planet’s atmosphere, and discovers interesting density clumps in its tenuous dust ring. It is February 28, 2007 and all the cameras and measuring instruments on board the probe are fully operational. But the passage does not last long. Its velocity considerably increased and its trajectory slightly changed by Jupiter’s enormous gravitational pull, New Horizons continues its journey toward the distant outer regions of the solar system.