yvonne maas wants to reinvent rockets from the ground up. there was rivalry. but recently there's cooperation. first of all the private space companies to not have a good business model yet. so over time with spacex and several others have multibillion-dollar contracts with nasa to ship freight and eventually astronauts in orbit. that money is important to them because nasa cannot put an american in space and hasn't been able to for six years. so there's rivalry and cooperation. also nasa is trying to be more noble. they're trying to encourage entrepreneurial outfits not at the level of spacex but student groups and small startups to put microsatellites up. masses trying to learn and roll with the time to be more entrepreneurial. >> host: you've mentioned that university of arizona has its own space program. >> guest: we have been entrusted by nasa twice to do everything except launch itself for space program. first the phoenix lander which went to the polar region. >> host: beyond a future station what about the importance of asteroids? >> guest: asteroids co