How NASA Creates Rain Clouds Using Rocket Engines NASA rocket engine tests don’t just shake the ground—they create massive clouds. These clouds are harmless, made only of hydrogen and oxygen, which turn into water and fall as rain. Aerospace innovation, space technology, rocket science, and advanced engineering at work. Credits: VideoFromSpace /YT, NASA /YT, nasastennis /IG #usa #NASA #rainclouds☁ #rainclouds #rocketleagueclips | Glass Media