W.J.Kolkert
http://www.kolkert.com/refractor.htmResults from the Kolkert-Observatory, with a description of the 4 inch instrumented refractor.
Submitted in section: Astronomy: Amateur: Personal Pages: W.J.Kolkert
Results from the Kolkert-Observatory, with a description of the 4 inch instrumented refractor.
Submitted in section: Astronomy: Amateur: Personal Pages: W.J.Kolkert