First static fire test of Falcon Heavy complete—one step closer to first test flight! pic.twitter.com/EZF4JOT8e4

— SpaceX (@SpaceX) January 24, 2018

SpaceX is one step closer to launching its much-anticipated Falcon Heavy rocket. On Jan. 24, the company successfully performed a static fire test of the Falcon Heavy’s engines on launch site LC-39A at NASA’s Kennedy Space Center in Cape Canaveral, Florida. The company tweeted a 22-second video showing a huge white cloud of exhaust gushing from the base of the launch vehicle during the test. As the cloud formed, a fireworks-like boom sounded.

Falcon Heavy hold-down firing this morning was good. Generated quite a thunderhead of steam. Launching in a week or so. pic.twitter.com/npaqatbNir

— Elon Musk (@elonmusk) January 24, 2018

The Falcon Heavy is based on the Falcon 9 but triples the number of first-stage engines, providing more lift. It is designed to carry large payloads to orbit and could eventually take people to the Moon or Mars. The first flight has been delayed by several years. Musk said in July that developing the new rocket has proven more challenging than expected.