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By pure chance, Stefan observed the Sun last Friday with a custom-made telescope. The active region seen here close to the edge of the Sun's disc have now rotated more towards us. A so-called coronal mass ejection coming from this region has caused the ongoing geomagnetic storm. 📹 S. Ströbele/ESO
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If you’re interested in Stefan’s custom setup, you can find all the details (in German) here: atmn.eu/2025/11/acut...
atmn.euAcuter Elite Phoenix Umbau – ATMN