Falcon Heavy
The SpaceX Falcon Heavy rests on Pad 39A at the Kennedy Space Center in Florida, on February 5, 2018, ahead of its demonstration mission. (JIM WATSON/AFP/Getty Images)
By Tom Anderson / February 6, 2018 3:31 pm

When Falcon Heavy lifts off, it will be the most powerful operational rocket in the world by a factor of two, with the ability to lift into orbit nearly 64 metric tons – a mass greater than a 737 jetliner loaded with passengers, crew, luggage and fuel, according to SpaceX.