Falcon 9’s first stage booster had previously been launched into space five times. Following stage separation, the booster landed on a SpaceX droneship, stationed off the coast of Florida. The two fairing halves were also retrieved in huge nets mounted on SpaceX ships in the Atlantic. SpaceX now routinely does things long considered impossible by space scientists. SpaceX returns rockets to soft landings on Earth instead of ditching the boosters into the ocean as NASA has done for decades.
On board this launch were 133 commercial and government spacecraft (including CubeSats, microsats, and orbital transfer vehicles) and 10 Starlink satellites – the most spacecraft ever deployed on a single mission. You can watch a replay of the mission here.