NEW HORIZONS compositions and temperatures, and examine Pluto’s atmospheric composition and structure. New Horizons also will study the small moons recently discovered in the Pluto system. The spacecraft will “sleep” in electronic hibernation for much of the cruise to Pluto. Operators will turn off all but the most critical electronic systems and monitor the spacecraft once a year to check out critical systems, calibrate instruments and perform course corrections, if necessary. The spacecraft will send back a beacon signal each week to give operators an instant read on spacecraft health. The entire spacecraft, drawing electricity from a single radioisotope thermoelectric generator, operates on less power than a pair of 100-watt household light bulbs. For more information about NASA and the New Horizons mission on the Web, visit: http://www.nasa.gov/newhorizons or http://pluto.jhuapl.edu NASA’s First Mission to Pluto and the Kuiper Belt 3