Partielle Sonnenfinsternis vom 29. März 2025
Trotz dichter Wolkendecke und Regen, gelang es mir für einen kurzen Augenblick die partielle Sonnenfinsternis am 29. März 2025 von Meilen (Schweiz) aus zu beobachten. Das beeindruckende Naturschauspiel zeigte sich nur kurz, aber umso schöner war dieser flüchtige ...
Observing comet C/2023 A3 (Tsuchinshan-ATLAS) in late October 2024
On the evening of October 21, 2024, around 20:30 local time (Switzerland), I had the opportunity to observe the comet C/2023 A3 Tsuchinshan-ATLAS. Using my Nikon Z7 camera equipped with an AF-S Nikkor 24-70mm lens, I managed to capture the celestial visitor as it made ...
Unser kosmologisches Modell am Prüfstand
Wie und wann entstanden Galaxien im frühen Universum und wie entwickelten sie sich zu den Galaxien, die wir heute beobachten? Diese Fragen lassen sich im Rahmen unseres kosmologischen Modells beantworten. Doch gerade dieses steht derzeit durch aktuelle Beobachtungen ...
Wondering how Mars looks like through a telescope?
A few days ago, on January 30, 2023, I captured Mars using a webcam (SPC900NC) attached to the Westerlund 90cm Telescope in Uppsala, Sweden. The focal length in the Nasmyth focus is 9 meter. The pixel size of the camera (5.6μm) thus leads to a pixel scale of ...
Finally! Comet C/2022 E3 (ZTF)
After desperately waiting for two weeks in a row, the weather here in Uppsala finally improved and we could observe the famous comet C/2022 E3 (ZTF) with our rooftop telescope at the Angström Laboratory, the so called "Westerlund Telescope". As the comet just ...
Long-term trends of light pollution
I am happy to announce that our paper on long-term trends in light pollution has been recently published in Monthly Notices of the Royal Astronomical Society. In the paper we present long-term (4–10 yr) trends of light pollution observed at 26 locations, ...
