Two Polaris Dawn astronauts completed the world's first all-private spacewalk in their new SpaceX extravehicular activity suits, on Day 3 of the groundbreaking mission.
Polaris Spaceplanes plans to scale up the vehicle again after testing MIRA, this time to a length of 22 feet (6.7 meters). NOVA will fly using four kerosene-fueled jet engines, in addition to its functional aerospike engine. This vehicle’s test campaign will involve full rocket-powered flig...