A Falcon 9 rocket carrying about 40 payloads, including NASA's Pandora exoplanet satellite, is scheduled to lift off from California's Vandenberg Space Force Base during a 57-minute window that opens at 8:19 a.m. EST (1319 GMT and 5:19 a.m. local California time).

Four astronauts on the Crew-11 mission will depart the International Space Station as early as Wednesday on NASA's 1st medical evacuation.