On August 10, 2007, Lu announced he was retiring from NASA to work at
Google. In June 2010, Lu left Google and worked out of the Sunfire Offices. In September 2011, Lu joined
Liquid Robotics as Chief of Innovative Applications, where his work includes outreach to promote new applications for ocean science, and in 2012, he joined Hover Inc. as its Chief Technology Officer. On June 28, 2012, Lu, with Apollo 9 Astronaut
Rusty Schweickart and
G. Scott Hubbard, Astronautics professor at
Stanford University announced plans to build and operate the first
privately-funded deep space mission called
Sentinel. Their non-profit
B612 Foundation will launch an
infrared space telescope in orbit around the Sun, where from a distance as great as from Earth, where it would detect and track asteroids and other
near-Earth objects posing threats to the planet. On October 25, 2016, B612 and Lu endorsed NASA's NEOcam proposed mission and ended the Sentinel project. As of 2022, Lu is working on a new project to find "killer asteroids" by analyzing terabytes of archived data. So far, the
B612 Foundation, cofounded by Lu, has found over 100 new potentially-threatening asteroids. This immense number-crunching effort is supported in part by Google's applied artificial intelligence project. ==Personal life==