Aurora Screensaver Online
✓ 免费在线极光屏保，极夜天空永不重复
A volumetric northern lights display high in the polar sky — no ground, no horizon, just aurora and stars — real emission-line colors, real substorm cycles, never the same twice. Free, no install, no signup.
- Volumetric, Not a TextureEvery frame is raymarched through the upper atmosphere, so curtains have real depth, folds, S-curls and stack in front of each other.
- Real Emission-Line ColorsOxygen 557.7nm green from 100–200km, crimson 630nm feathering above 200km, nitrogen violet and magenta on a knife-sharp lower border.
- Randomized Substorm CyclesQuiet arc, sudden breakup, poleward surge, then patchy pulsating aurora — durations and strengths are sampled at random every time.
- Physically Colored StarsStars are sampled at real spectral-type abundances and colored by blackbody temperature, dimming as the aurora brightens.