What would space conquest be without a rocket? Not much.

This is why, whether we have an ecological spirit or not, we are going to focus on the launchers reactors, and specially on the flames which go out and teach us a lot about the techniques used.

The Youtube channel "Techniques Spatiales" offers us two splendid videos to learn everything about these terrifying flames that are dreamy and yet are so essential in the discovery of our universe.

Hang on, it's technical but crystal clear. The second video is as follows, after watching the first ..