# Solar wind travels up to 4 times faster than expected, eclipse spacecraft reveals

- slug: solar-wind-travels-up-to-4-times-faster-than-expected-eclipse-spacecraft-reveals
- date: 2026-04-15
- category: Space & Aerospace

ESA Proba-3 measured slow solar wind at 250-500 km/s — 3-4x faster than models predicted. The K-corona was supposed to be slow. ASPIICS says otherwise. Space weather forecasting now needs to account for it.

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