The 21st launch of the year will see a SpaceX rocket launch from Florida early Wednesday SpaceX plans a middle-of-the-night Falcon 9 rocket launch early Wednesday, and it will already mark the 21st orbital launch of the year from Florida's Space Coast.

The spacecraft, SPHEREx and PUNCH, had been expected to launch on a SpaceX rocket on Saturday. Two NASA missions will have to wait longer for a launch aboard a single rocket. Both aim to unravel mysteries about the universe — one by peering far from Earth, the other by looking closer to home.

Watch live as NASA launches the SPHEREx telescope and PUNCH mission aboard a SpaceX Falcon 9 rocket to explore the universe and the sun. SPHEREx will create a 3D all-sky map of 450 million galaxies, while PUNCH will use small satellites to study the sun’s impact on space weather and Earth’s communications.

Nasa has postponed the launch of its SPHEREx and PUNCH missions scheduled on a SpaceX Falcon 9 rocket from California. The delay allows for further rocket checkouts. SPHEREx will scan the sky in infrared light to study galaxies and cosmic history,