SpaceX launched a number of Starlink satellites atop a Falcon 9 rocket Sunday evening.According to the spaceflight company, the Starlink SL-6-54 mission is set to launch 23 satellites to low-Earth orbit from Space Launch Complex 40 at Cape Canaveral Space Force Station. The rocket launched as the window opened at 6:08 p.m.The Falcon 9 first-stage rocket booster supporting this mission previously launched 12 other missions including Intelsat IS-40e, CRS-26, EUTELSAT 36D, and several Starlink missions.SpaceX successfully landed the first-stage booster on a ship stationed in the Atlantic Ocean.