On Sunday, SpaceX successfully carried out a test firing of its new Starship Raptor rocket engine, and Elon Musk was more than happy to share footage of the test via Twitter.

Raptor is the engine SpaceX intends to use to eventually get to Mars, which is why it has roughly twice the thrust of the Merlin 1D engine used in the Falcon 9 launch vehicle. As Business Insider reports, the engine underwent a radical redesign and is capable of 200 metric tons of thrust. But before it heads to Mars, Musk is aiming for the Moon.

Here's the rocket in action:

pic.twitter.com/ChEGbjTGKZ

— Elon Musk (@elonmusk) February 4, 2019

pic.twitter.com/yFhNx3fiOD

— Elon Musk (@elonmusk) February 4, 2019

As to why the flames are iridescent, Musk explains in a follow-up tweet that, "Engine use methox torch igniters. Green tinge is either camera saturation or a tiny bit of copper from the chamber."

The Raptor engine has been test fired before, but that was before the redesign occurred. To publicly show the first test fire following the design changes and have it work perfectly will be of great encouragement to the SpaceX team. Their next task is to work up the chamber pressure to 300 bar, something Musk described as "a mad level" back in December.