JP's Astro Pages – /astrophotography/light pollution/solar system/, Astrophysicist Johannes Puschnig writes about his scientific work, i.e. galaxy evolution and star formation. His blog covers topics such as light pollution, observational astronomy, cosmology. He also reviews astronomical equipment such as CCD cameras and lenses for astrophotography. Essays in German cover these topics: Sonnensystem, Planeten, Ephemeridenrechnung, Venustransit.