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Comments on the new images from photographs of Saturn's moon Rhea which were seen by Paul Schenk. The special viewer that merged two images into a three-dimensional view; Photographs taken by the Voyager spacecraft; Schenk's experience with the power of stereo images.

Reports on images taken of Jupiter's innermost moons Metis, Amalthea, and Thebe, while the Galileo spacecraft was examining Jupiter's volcanically active moon Io. Discovery of a 50-km-long streak called Ida on Amalthea; Suggestions as to the composition and causes that formed Ida; Discovery of a 40-km-wide crater named Zethus on Thebe.

Focuses on images of colored auroras on Jupiter's moon, Io, captured by Galileo spacecraft. Theories on the causes of the blue, green and red flashes; Details on the large electric current that flows from Io to Jupiter and how it may affect the auroras; Predictions of future images; Analysis of Paul E. Geissler and colleagues published in the August 6, 1999 issue of `Science.'

Reports on evidence gathered by the Galileo spacecraft in December 1997 that suggests a liquid ocean or partially frozen sea exists on the Europa, a satellite of the planet Jupiter. Notable areas examined, including the crater Pwyll; Interpretation of data by Robert T. Pappalardo and James Head, of Brown University, Providence, Rhode Island; Comments from William B. McKinnon; Forecasts.

Comments on the surface of Uranus' moon Miranda. Initial proposals about the cause of the rough-hewn surface; Results of a reanalysis of Voyager images by Robert T. Pappalardo, Ronald Greeley and Stephen J. Reynolds; Images of Miranda's Arden and Inverness coronas; Details.

Scientists have finally received the pictures of Venus' atmosphere taken in February 1990 by the Galileo spacecraft as it whipped around the planet--one of a series of maneuvers that will give Galileo the speed needed to propel it to Jupiter, where it should arrive in 1995. Many spacecraft have looked at Venus' clouds, but Magellan both photographed the cloud tops and recorded near-infrared emissions from deeper clouds. The lower cloud patterns differ distinctly from those at the top, report Galileo scientists analyzing the images radioed to Earth from the craft. The near-infrared images revealed convection zones within clouds due to rising heat, while the cloud tops appeared fluffier--due to reflected sunlight--in the visible-light photographs.