... On February 7th, this honey comb of aluminum cells filled with aerogel was launched on the STARDUST mission to interplanetary space. STARDUST's goal is to capture dust from a comet's tail and return to planet Earth - the first sample return mission to a comet! ... Galaxies, like stars, frequently form groups. ... La Nina Earth . ... Dark Sky, Bright Sun . ... Pluto: The Frozen Planet . ... This portrait of Pluto and its companion Charon was taken by the Hubble Space Telescope in 1994. ...