Imagine the excitement of traveling to the upper limits of the atmosphere, experiencing weightlessness and the beauty of mother Earth, and returning home to share your stories. Several companies in the United States are developing and actively marketing this experience and it is anticipated that...

In the early 21st century, the private commercial space transportation industry demonstrated that commercial human space transportation is both technologically and economically feasible. In 2004, the United States Congress responded by passing legislation authorizing the Department of...