Home Erellaz Astronomy, Geophysics and some python resources. Base Living the life. Pictures of the sky Astrophotography. Geophysics Seismic acquisition. Climbing On four continents. Optics, astronomy Optical testing and telescope making. Photos A few pictures taken over the years. Project MOANA M.O.A.N.A.: Mother Of All Newtonian Astrographs. Open Astronomy Open astronomical datasets from MOANA. Project SarHa S.a.r.H.a.: Solar astrograph refractor for Hydrogen alpha