The postponement, driven primarily by thick clouds, was the second scrub of the flight since an issue with the rocket on Saturday night.

NASA and SpaceX successfully launched their SPHEREx and PUNCH missions into orbit Tuesday night from Vandenberg Space Force Base in California, to "collect" data on the sun and millions of galaxies.

The missions' first several delays were to allow for additional time for checkouts and processing on the Falcon 9 rocket they'll ride to space, according to NASA. Now, the delay is to "allow SpaceX to complete rocket preparations ahead of liftoff," NASA said in an update.