Although the Falcon Heavy has proven itself flight-worthy, this is still just the second launch of a rocket with a staggering 27 engines, so there is definitely some uncertainty. Each of the three cores is new, and SpaceX is counting on re-using the two side boosters for another Falcon Heavy mission as early as June-the launch of the US Air Force's Space Test Program-2 mission carrying several military and scientific research satellites.
The landing happened roughly eight minutes after the rocket took off into orbit and was followed by the core rocket stage landing on a SpaceX droneship in the Atlantic.
Make sure you don't miss the rapturous applause from SpaceX's mission control.
Even cooler are the videos from spectators who watched the boosters land nearly simultaneously at Cape Canaveral.
Each of these numbers denoted major milestone achieved by SpaceX with the flight of the Arabsat-6A mission on one of the company's Falcon Heavy rockets.
SpaceX's mission was to deploy Arabsat-6A, a high-capacity telecommunications satellite that will deliver television, radio, Internet and mobile communications to customers in the Middle East, Africa and Europe, according to a press kit.
The rocket roared into space at 6:35 p.m. ET from the Kennedy Space Center in Cape Canaveral, Florida.
The Falcon Heavy is created to loft into low-Earth orbit up to 140,000 pounds - more than any American rocket has been able to carry since NASA's Saturn V, which took Apollo astronauts to the moon in the 1960s and '70s. If successful, Arabsat will reportedly become the first operator in the region for satellite capacities and services.
Ahead of Thursday's launch attempt, the company said the rocket-composed of three Falcon 9, Block 5 cores-remains in good condition. Built by Lockheed Martin for Saudi Arabian corporation Arabsat, the satellite is described by Lockheed vice president Lisa Callahan as one of "the most advanced commercial communications satellites we've ever built".