Unfortunately, only open to US-based entities. The rules of the game can be found on the challenge website [1]<p>[1] <a href="http://www.nasa.gov/sites/default/files/files/CCP_CQ_OPSRUL_001.pdf" rel="nofollow">http://www.nasa.gov/sites/default/files/files/CCP_CQ_OPSRUL_...</a>
Out of curiosity (I know nothing about space exploration and do not have strong background in physics either), just to <i>try</i> to build a tiny space-shuttle that would have a chance, what would be the total cost?<p>ps. These competitions are probably for universities or high-tech laboratories (maybe Google would put a team together...).