22. April 202522. April 2025 Ralf Rohner The “Smile in the Sky” Conjunction – or how to make a Media Hype about nothing
9. January 20235. June 2025 Ralf Rohner Why does the Milky Way Galaxy in some images appear to be an arc?
16. December 202218. December 2022 Ralf Rohner What is an astro-modified camera and is it required for astrophotogrphy?