Astronauts spoke to participants of the International Space University on the future of human spaceflight during a panel discussion.

Current and former NASA and international astronauts spoke to participants of the International Space University on the future of human spaceflight during a panel discussion at the Kennedy Space Center Visitor Complex in Florida. Participating in the discussion is Jim Voss, director of advanced programs at Sierra Nevada Corporation and former NASA astronaut.

The International Space University is a nine-week intensive course designed for post-graduate university students and professionals during the summer. The program is hosted by a different country each year, providing a unique educational experience for participants from around the world. NASA Kennedy Space Center and the Florida Institute of Technology in Melbourne, Fla., are co-hosting this year’s event which runs from June 4 to Aug. 3. There are about 125 participants representing 31 countries. For more information, visit http://www.isunet.edu. Photo credit: NASA/Kim Shiflett