SpaceX now has three of its next-generation Starship rockets under construction, as aerial video shows the latest developments at the company's facility in Florida.

The first bands of stainless steel for another Starship rocket were put on a stand Thursday, and were captured in a video taken from a flying drone. Former commercial pilot John Winkopp took the video and gave CNBC permission to use his footage.

Starship is a massive rocket that SpaceX is developing to eventually launch cargo and people to the moon and Mars. The rocket is designed to be reusable so SpaceX can launch and land it multiple times, like a commercial airplane.

SpaceX is building three Starship rockets simultaneously: One in at its facility in Boca Chica, Texas and two at its facility in Cocoa, Florida.