Science ❯ Physics ❯ Fluid Dynamics

Cryogenics

Liquid Hydrogen Liquid Oxygen Hydrogen Leaks Cryogenic Testing Liquid Oxygen Systems Helium Flow Hydrogen Fuel Ice Crystals Formation Rocket Science Engine Cooling Issues

ESA Ariane 6 Launch Behind Night-Sky Spiral Seen Across the U.S. Northeast

Meteorologists say vented propellant from an upper stage froze into ice crystals, creating the brief spiral visible after sunset.

ESA’s Themis Reusable Stage Stands Fully Assembled on Swedish Pad