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 ...
The artificial Skyglow above Stockholm and Why we care about it
On October 24th, 2015 I was invited to give a talk at the Swedish astronomy day ("Astronomdagarna") in Uppsala. You can find the video stream of my presentation below. I talk about the impact of light pollution on wildlife, ecosystem, human health and well-being and ...