As the agency's SPHEREx space telescope and PUNCH solar mission rode toward their orbital stations at 10:09 p.m. EST (0209 March 9 GMT), members of mission control appeared elated, onlookers who caught a peek at the liftoff cheered, and the scientists who built these missions exuded a blend of relief and excitement.

The $488 million Spherex mission aims to explain how galaxies formed and evolved over billions of years, and how the universe expanded so fast in its first moments.

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

SpaceX launches rocket loaded with NASA telescope