In an exclusive interview, the four Polaris Dawn crew members opened up about seeing the planet from orbit and conducting the first all-civilian spacewalk.

The research in the Polaris program, planned to be three flights, is particularly focused on human health and the effects of spaceflight on the body. The current mission will be studied by Baylor College of Medicine, with the astronauts giving blood and going through extensive biomedical testing both before and after the flight.

Earth orbit that included the world’s first commercial spacewalk as it aims to splash down off Florida’s coast.