One of the highlights was the rocket's cargo: a mannequin named Starman wearing a SpaceX flight suit and sitting behind the wheel of the Roadster. SpaceX has successfully landed multiple Falcon 9 rockets on the ship in the past.
Musk also talked about a third drone ship for landing future rockets offshore.
SpaceX is building a third drone ship called "A Shortfall of Gravitas" and it will be deployed in the east "space coast" to handle landings at Cape Canaveral. SpaceX has a launch scheduled for 17 February which will carry two of the company's Starlink satellites and it will be put in low Earth orbit with a used Falcon 9 rocket. This will make it possible for both of the side boosters on Falcon Heavy to land safely at sea.
"Not enough ignition fluid to light the outer two engines after several three engine relights", Musk also said Monday on the center core's landing failure.
The fix, he said, was "pretty obvious".
Congress set to vote on bipartisan spending package
The higher defense spending should allow President Donald Trump to make good on a campaign promise for a US military build-up.
Its name? "A Shortfall of Gravitas".
It's not just Falcon Heavy that benefits, according to Musk.
Musk later revealed the third booster, brand new, slammed into the Atlantic at 300 miles per hour and missed the floating landing platform, scattering shrapnel all over the deck and knocking out two engines. And SpaceX has plans for an even bigger rocket, the Big Falcon Rocket.
SpaceX's secret Falcon Heavy payload is known as Arch 1.2, and it contains Issac Asimov's Foundation trilogy, a sci-fi series that discusses the preservation of humankind - a relevant topic. Hispasat 30W-6, a commercial communications satellite, will be boosted to a geostationary transfer orbit.
The auto with a dummy driver dubbed "Starman" was tied to the Falcon Heavy rocket by SpaceX and was originally meant to be inserted into an orbit that would fly closer to Mars but the third engine burn of the Falcon Heavy upper stage "exceeded" that orbit, sending the vehicle into deep space, Elon Musk had said earlier this week.
It was his first time seeing a rocket shoot into space, but definitely not his last.