Beginning in 1961, at what was then the Ramo-Wooldridge Corporation, the dedicated employees of Space Park designed and built more than 100 of the world’s most technically challenging satellites, rocket engines and astronomical observatories. The technologies they developed and continue to develop, led to such breakthroughs as NASA Pioneer 10, the first spacecraft to leave our solar system; the descent engine for the Apollo Lunar Excursion Module; the Defense Department’s Milstar satellite communication network; NASA’s Tracking and Data Relay Satellite System “Switchboard in the Sky” and astronomy and science satellites such as the Chandra X-ray observatory.