Science ❯ Physics ❯ Fluid Dynamics

Cryogenics

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

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