... X-Rays from the Galactic Plane . ... Its target was a spot in the small constellation Scutum, within the Milky Way's zone of avoidance where galactic gas and dust clouds block visible light, making a poor window for optical telescopes. A Piece of Interplanetary Dust . ... Tycho and Copernicus: Lunar Ray Craters . ... Farewell Jupiter . ... Next stop: Saturn. The Cassini spacecraft, launched from Earth four years ago, has now swung past Jupiter and should arrive at Saturn in the year 2004. ...