The second in a doubleheader launch, a SpaceX rocket took off on a record-breaking flight at 2:28 a.m. July 2.

SpaceX will ring in July with a doubleheader launch day. Here's what to know about the two rocket launches coming up.

SpaceX launched its first Falcon 9 rocket on June 4, 2010. Since then it has gone through five major revisions, leading to the current Block 5 model that is used to launch satellites, robotic planetary missions and astronauts. The most launched U.S. rocket in history, of its 500th missions, all but five were successful.