Live coverage: Two satellites lift off aboard Ariane 5

A logistics-delivery vessel for the International Space Station, launched and operated privately by commercial companies on behalf of NASA, is scheduled to arrive at the lab complex Saturday at 6:05 a.m. EDT (1005 GMT).

SpaceX rolled out a Falcon 9 rocket to launch pad 39A early Tuesday for a prelaunch hotfire test before this weekend’s liftoff with a classified payload for the National Reconnaissance Office, the U.S. government spy satellite agency. The static fire test was completed at 3:02 p.m. (1902 GMT).

The launch of the James Webb Space Telescope will not happen in March 2021 — the mission’s previously-scheduled launch date — after the coronavirus pandemic forced a more than 50 percent reduction in staff levels at the observatory’s assembly and test facility.