This is the first time since June 2004 that the Japanese supercomputer "Earth Simulator" has been ranked first on the TOP500 list.

ENGADGET: Fujitsu K supercomputer now ranked fastest in the world, dethrones China's Tianhe-1A

Contestants will be tasked to work with different sets of imagery from NASA's lab on earth and on the Space Station, as well as in a simulator.

ENGADGET: NASA announces competition to improve Robonaut's sight

The astronauts aboard the Space Shuttle Discovery today used a computer simulator to practice landing in preparation for their planned return to Earth tomorrow.

NPR: Former Astronaut on NASA Risk Assessment