Fram2 will send four people from four different nations to low Earth orbit for three to five days. Those crewmembers — all of them spaceflight rookies — are mission commander Chun Wang of Malta, vehicle commander Jannicke Mikkelsen of Norway, pilot Rabea Rogge of Germany, and Australian Eric Phillips, Fram2's medical officer and mission specialist.

The Fram2 astronauts launched from Kennedy Space Center Pad 39A on a stormy Monday night. Here's what we know about this mysterious mission of firsts.