Photos: Falcon takes flight

Billionaire Jared Isaacman and SpaceX crew trainer Sarah Gillis prepared to open the forward hatch of their Polaris Dawn spacecraft early Thursday to take turns floating outside in the first non-government spacewalk in the history of space exploration. Depressurizing the spacecraft will begin around 2:23 a.m. EDT (0623 UTC) and a scaffold-like “Skywalker” assembly extending just above the hatch will be used for stability.

NASA’s Interstellar Mapping and Acceleration Probe (IMAP) will be the primary payload on a SpaceX Falcon 9 rocket launching no earlier than Sep. 23. The vehicle is joined by the Carruthers Geocorona Observatory and NOAA’s Space Weather Follow-On – Lagrange 1 (SWFO-L1) observatory.

Several NASA astronauts, plus Boeing test pilot Chris Ferguson, recently participated in a training session at Cape Canaveral, practicing how they would evacuate from the Atlas 5 rocket’s launch pad in the event of a countdown emergency.