Last night’s strong geomagnetic storm painted the sky with an unusually rare red aurora — and from the International Space Station it looked like the crew was literally flying through the glowing curtain, Russian cosmonaut Sergey Kud-Sverchkov said.

Why the red? Green auroras typically glow around ~100 km altitude, but red emissions come much higher (~300–400 km), where the atmosphere is thinner and it takes more energy to light it up — which is why this color is far less common.

#SpaceWeather #Aurora #ISS #SolarStorm