University of California, Berkeley, scientists quietly switched off one of the campus's working satellites in April, ending a 10-year series of ups and downs for NASA's first and only low-cost, university-class Explorer spacecraft. The Cosmic Hot Interstellar Plasma Spectrometer satellite (CHIPSat), funded by NASA in 1998, was designed to look for extreme ultraviolet (EUV) emissions from the bubble of hot gas that envelops our solar system out to a distance of several hundred light years.