The Falcon Heavy is a large cargo-lifting rocket developed by private spaceflight company SpaceX. When it launched on its maiden voyage on Feb. 6, 2018, the rocket was the most powerful booster in operation at that time. (The Saturn V, which launched the Apollo moon missions, was the most powerful ever.) 

On that debut test flight, the Falcon Heavy met almost all of its major objectives, including (notably) flying company founder and CEO Elon Musk's Tesla Roadster, carrying a mannequin named "Starman," to space. 

More flights are planned for later in 2018 as the company begins to seek out more customers for the Falcon Heavy. Eventually, perhaps by 2020, Musk plans to use the experience in developing the Falcon Heavy to make an even bigger rocket, named the Big Falcon Rocket (BFR), for Mars exploration.