Since 1981, the National Space Society
(NSS) has sponsored the International
Space Development Conference
, attracting speakers ranging from Dr.
, the second human to walk on the moon to Dr. Robert Zubrin, the man who wants us to walk on Mars. In between this A and Z have been some of the most prominent names in the development of technology, astronomy, electronics, law, space tourism, space solar power, and commercial possibilities on the next frontier.