NASA's New Horizons mission has reached a special milestone on its way to reconnoiter the Pluto system, coming closer to the dwarf planet than any other spacecraft.
FULL STORY at http://science.nasa.gov/science-news/science-at-nasa/2011/03dec_newhorizons/
See also the related video, Dwarf Planet Mysteries Beckon to New Horizons: http://www.youtube.com/watch?v=JtcIbJKZZQQ
