SPACEX'S POLARIS DAWN IS SENDING ASTRONAUTS TO A LITERAL RADIATION BELT TO TEST NEW SPACESUITS

Summary from the TLDR newsletter

Polaris Dawn, a collaboration between SpaceX and Shift4 CEO Jared Isaacman, will launch on Monday. The mission will send four astronauts in a SpaceX Crew Dragon capsule on an orbit that will carry them through the innermost of the Van Allen belts, the bands of high-energy radiation that surround our planet. Two of the crew members will complete a spacewalk midway through the 5-day mission. The mission will be the first flight test of SpaceX's new pressure suits for extravehicular activities.