Massive limb eruption in calcium light

On the morning of 10-26-2021 at 10:50am Chicago Time, Active region 2891 unleashed several powerful mass ejections. The video shows just one of these events captured at the wavelength 393.37nm which represents ionized Calcium plasma. A celestron luminos 2.5x barlow was used to extend the focal length to approximately 3000mm. This plasma cloud billowed out […]


Bedeckung der Sonnenfleckengruppe AR 2303

Das Bild zeigt 4 Phasen der Bedeckung des Sonnenfleckes AR 2303 während der partiellen Sonnenfinsternis am 20. März 2015. Avistream jeweils 300 frames, davon je 50% gestackt. Bildverarbeitung AviStak 1.8 + Photoshop CS 2