A team blasting off in a SpaceX capsule, as soon as early Tuesday morning, will attempt the first ever private spacewalk, planned for later this week. Spacewalks can be risky; one study found that historically, 22% of all spacewalks experienced significant incidents and/or close calls. The SpaceX capsule has no airlock, all 4 crew members will be exposed to the vacuum of space when the hatch opens. (Photo from SpaceX) #NASA #Space #science #SpaceX