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Observatories > JPL

JPL: Jet Propulsion Laboratory

Credit: JPL
The site of JPL at Pasadena, California.

credit: JPL
The JPL controls trajectories and observations of NASA space probes.

In the 1970s, 1980s, and early 1990s, NASA focused JPL's expertise on large, complex, one-of-a-kind space missions. This era produced the Voyagers to the outer planets, the Vikings to Mars (in partnership with NASA's Langley Research Center), the Galileo mission to the Jupiter system (in partnership with NASA's Ames Research Center), and Cassini-Huygens to the Saturn system (in partnership with the European Space Agency and the Italian Space Agency). These legendary spacecraft extended humanity's senses throughout the solar system, letting us examine the planets and moons up close.

JPL's beginnings can be traced to the mid-1930s, when a few Caltech students and amateur rocket enthusiasts started tinkering with rockets. After an unintended explosion occurred on campus, the group and its experiments relocated to an isolated area next to the San Gabriel Mountains, the present-day site of JPL. In the following decade, as an anxious country sought to respond to the menacing challenge of German V-2 rockets, the fledgling Jet Propulsion Laboratory (officially named in 1944, some 14 years before NASA was formed) was sponsored by the U.S. Army to develop rocket technology and the Corporal and Sergeant missile systems.

The early years of space exploration were fueled by the Cold War. The Soviet Union won the first round in October 1957 by placing Sputnik into Earth orbit. The "beep-beep" sound transmitted by the satellite was nervously heard around the free world, and pressure mounted for the United States to respond. In less than three months, JPL had built Explorer 1, launched in January 1958 to become America's first satellite. Even this first spacecraft made an important scientific discovery: it detected what would become known as the Van Allen radiation belts encircling Earth, named after James Van Allen, the scientist who designed the main instrument on Explorer 1.
The National Aeronautics and Space Administration was founded in October 1958, and JPL was transferred from the Army to the new agency. The transition from the Army to NASA also marked another change. The Laboratory began to turn its attention from the rockets themselves to the payloads they would carry. Developing these payloads - scientific spacecraft - would become the new focus and place JPL at the center of the Space Race with the Soviet Union. Even though the Laboratory's charter had completely evolved away from rockets and jets, "Jet Propulsion Laboratory" had become the official name and was retained. Another defining moment for America in space came in 1962, when the JPL-built Mariner 2 flew past Venus to become the world's first spacecraft to successfully encounter another planet. Thus commenced a long series of "first ever" accomplishments by JPL that helped define history's first five decades of space exploration. JPL has a unique position within the NASA family. Ever since its transfer to NASA, JPL has been structured as an FFRDC(Federally Funded Research and Development Center) dedicated to the robotic exploration of space. The Laboratory is NASA's only FFRDC and works alongside NASA's nine field centers. However, unlike those centers, which are staffed by government civil servants, JPL is managed for NASA by Caltech under a contractual arrangement begun in 1958 and renewed every five years. Thus, JPLers are Caltech employees.

Credit: JPL