information. - Univelt

AAS PRESIDENTFrank A. SlazerVICE PRESIDENT - PUBLICATIONSProf. David B. SpencerEDITORMichael L. OsborneSERIES EDITORRobert H. JacobsNorthrop GrummanPennsylvania State UniversityLockheed Martin Space Systems Co.Univelt, IncorporatedFront Cover Illustration:The Juno spacecraft, built for NASA/JPL by Lockheed Martin, was launched in 2011 and will arriveat Jupiter in 2016. Juno’s mission is to peer deep within the gas giant’s atmosphere andhelp answer questions about the planet’s formation, thus providing insights to the early evolutionof our solar system. (Image Credit: Courtesy of NASA/JPL)Frontispiece:NASA’s twin GRAIL spacecraft, Ebb and Flow, are currently in orbit around the Moon. GRAIL(short for Gravity Recovery And Interior Laboratory) measures radio signals between the twoformation-flying spacecraft to map the moon’s gravitational field to an unprecedented level ofdetail. The spacecraft were built by Lockheed Martin and launched in 2011.(Image Credit: Courtesy of NASA/JPL-Caltech/MIT)iii