California has 3 NASA CENTERS
 
AMES RESEARCH
CENTER 
ARMSTRONG FLIGHT
RESEARCH CENTER
JET PROPULSION
LABORATORY
     
NASA's Ames Research Center, one of ten NASA field centers, is located in the heart of California's Silicon Valley.

Since 1939, Ames has led NASA in conducting world-class reserach and development in aeronautics, exploration technology and science aligned with the center's core capabilities.
NASA's Armstrong is the Agency's lead center for atmospheric flight research, operations, and testing and continues to accelerate advances in science, technology, and exploration to enhance knowledge, education, innovation, economic vitality, and stewardship of Earth. The Jet Propulsion Laboratory is a unique national research facility that carries out robotic space and Earth science missions.

JPL helped open the Space Age by developing America's first Earth-orbiting science satellite, creating the first successful interplanetary spacecraft, and sending robotic missions to study all the planets in the solar system as well as asteroids, comets and Earth's moon.
 
California is Home to the
MOJAVE AIR AND SPACE PORT
known as the "Civilian Aerospace Test Center"
 
The Mojave Air and Space Port is home to more than 60 companies engaged in flight development, highly advanced aerospace design, flight test and research, the wind industry, heavy rail industrial manufacturing, and airliner storage and reclamation.  It is the first facility to be licensed in the United States for horizontal launches of reusable spacecraft, being certified as a spaceport by the Federal Aviation Administration in 2004.  The development and launch of the experimental SpaceShipOne was considered one of the biggest "firsts" in the history of Mojave.

Tenants at the port include the National Test Pilot School, Virgin Galactic, BAE Systems, Orbital ATK, Scaled Composites, ASB Avionics and mnay more.