Google has signed a long-term lease for part of a historic Navy air base, where it plans to renovate three massive hangars and use them for projects involving aviation, space exploration and robotics. The giant Internet company will pay $1.16 billion in rent over 60 years for the property, which also includes a working air field, golf course and other buildings. The 1,000-acre site is part of the former Moffett Field Naval Air Station on the San Francisco Peninsula. Google plans to invest more than $200 million to refurbish the hangars and add other improvements, including a museum or educational facility that will showcase the history of Moffett and Silicon Valley, according to a NASA statement. The agency said a Google subsidiary called Planetary Ventures LLC will use the hangars for "research, development, assembly and testing in the areas of space exploration, aviation, rover/robotics and other emerging technologies." Google already has a separate lease for another portion of the former air base, where it wants to build a second campus.