Named in memory of Timothy Warner (1961–1990), chief mission planner for the Cosmic Background Explorer’s Diffuse Infrared Background Experiment (DIRBE). Tim skillfully integrated the science and engineering of DIRBE, translating the principal investigator’s observing programs into common loads for the instrument that will perform an all-sky infrared survey and reveal the glow of the first stars and galaxies formed after the Big Bang. Prior to his work on COBE, he was an operations engineer for the Solar Maximum Mission’s Coronagraph/Polarimeter experiment, scheduling the instrument and performing preliminary data analysis. He co-authored a paper on the instrument’s observations of space debris, research that was consulted by Hubble Space Telescope engineers. Tim’s artistic talents found expression in cartoons, paintings and contributions to Paramount Pictures’ films, including special-effects work. He was also involved... _ _.