Farewell Jupiter . ... Credit Copyright: Cassini Imaging Team , Cassini Project , NASA . ... The Cassini spacecraft , launched from Earth four years ago, has now swung past Jupiter and should arrive at Saturn in the year 2004. Pictured to the left is a parting shot from Cassini in January that would not have been possible from Earth: Jupiter showing a crescent phase . From the Earth and all points sunward of Jupiter , the gas giant will always appear more fully lit than a crescent . ...