The Space Sciences Laboratory (SSL) is an Organized Research Unit (ORU) of the University of California, Berkeley. Founded in 1959, the laboratory is located in the Berkeley Hills above the university campus. It has developed and continues to develop many projects in the space sciences, including the search for extraterrestrial life (SETI@home). The laboratory have built instruments to fly on more than 100 satellites and flown more than 150 balloons to "measure electric fields, auroral x-rays, hard x-rays and gamma rays, cosmic rays and the cosmic microwave background." The lab has also built and flown two dozen rockets to measure "auroral particles, UV emissions, and solar flare nuclei." It currently has projects categorized into planetary projects, geospace projects, solar and heliophysics projects, astrophysics and exoplanets projects, which are accompanied by a missions operations system, an engineering division and an information lab.