Otto Heckmann

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1	THE MESSENGER No[removed]September 1983 Otto Heckmann[removed] Add to Reading List Source URL: www.eso.org Language: English - Date: 2009-06-05 10:39:26 Astronomische Gesellschaft Hamburg-Bergedorf Observatory Heckmann European Southern Observatory Walter Baade Jan Oort Astronomy Science Otto Heckmann
2	PDF Document Add to Reading List Source URL: www.iau.org Language: English - Date: 2009-07-22 10:51:32 Space Otto Heckmann Leo Goldberg Planet Franco Pacini Planets Dwarf planets IAU Astronomy International Astronomical Union Planetary science