The company Planetary Resources plans to develop and launch a series of robotic systems and unmanned spacecraft, starting with its Arkyd-100 Earth-orbiting space telescopes that it hopes to launch by the end of 2013 to identify candidate near-Earth asteroids containing natural resources. A single 500-meter platinum-rich asteroid would have the equivalent of all the platinum-group metals ever mined on Earth, the company said. And the right 80-meter asteroid would have more than $100 billion worth of materials, Anderson said.