IN THIS ISSUE: Exploring New Worlds in Space: The Other Moons /2 Joseph A. Burns, associate professor of theoretical and applied mechanics, and Joseph Veverka, associate professor of astronomy, discuss what has been learned about the natural satellites of the solar system and what may be anticipated from the Voyager and Galileo missions.) ... Phobos: A Captured, Fractured Asteroid? /11 (A Cornell Ph.D. dissertation in geological sciences, a photointerpretive study of Viking Orbiter pictures of the moons of Mars, is the basis of this article. Peter Thomas, now a research associate at Cornell's Center for Radiophysics and Space Research, wrote the thesis; Arthur L. Bloom, professor of geological sciences, was chairman of his graduate committee.) ... Clues to an Understanding of Volcanism /18 (Studies of volcanism on Earth may profit from comparative studies of volcanism on other planets and their satellites, as well as on Earth's Moon, according to Donald L. Turcotte, professor of geological sciences.) ... Cold Skin and a Warm Heart: A Model for Earth's Moon /26 (Arthur F. Kuckes, professor of applied and engineering physics, explains his study of magnetometer data obtained in the Apollo program, and his conclusions about convection in the Moon.) ... Register /33 ... Vantage /41 (Engineering strength in soccer and football is recognized in a prejudiced look at this year's Cornell teams.) ... Faculty Publications /44