Google Inc Chief Executive Officer and Co-founder Larry Page and Chairman Eric Schmidt are among a roster of billionaires who backed a small satellite built by privately held Planetary Resources Inc that was aboard an unmanned rocket that blew up during a launch on Tuesday. Planetary Resources, which intends to mine asteroids for fuel, water and minerals, said it also counts Virgin Group Founder Richard Branson, Ross Perot Jr, former Microsoft Corp executive Charles Simonyi and John Whitehead, the former chief executive of Goldman Sachs Group Inc, among its investors.