Ed Lu, right, Chairman of the B612 Foundation, and Rusty Schweickart, left, Chairman Emeritus of B612 and former Apollo 9 astronaut, talks about Sentinel Space Telescope during a news conference in ... more 
Ed Lu, right, Chairman of the B612 Foundation, and Rusty Schweickart, left, Chairman Emeritus of B612 and former Apollo 9 astronaut, talks about Sentinel Space Telescope during a news conference in San Francisco, Thursday, June 28, 2012. The group of ex-NASA astronauts and scientists on Thursday announced they plan to launch a privately-funded space telescope to search for small asteroids that may pose a danger to Earth. (AP Photo/Paul Sakuma) less 
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Associated Press | Photo By Paul Sakuma
Thu, Jun 28, 2012 4:56 PM EDT