Located in the heart of Silicon Valley, NASA’s Ames Research Center cordially invites you to tour its intriguing Visitor Center and learn about all things NASA, while exploring exciting NASA missions. During your visit, you can see a real moon rock, a Martian asteroid, learn how astronauts live and work in space and much more! Open six days a week, the Visitor Center is free and features a large-screen theater showing a variety of informative presentations and films to whet your appetite for NASA.