DLR https://astronomische-gesellschaft.de/de/aktivitaeten/publ/jb/inst/berlin/dlr https://astronomische-gesellschaft.de/logo.png DLR JB-DLR_Planeten-1999.pdf JB-DLR_Planeten-2000.pdf JB-DLR_Planeten-2001.pdf JB-DLR_Planeten-2002.pdf JB-DLR_Planeten-2003.pdf JB-DLR_Planeten-2005.pdf JB-DLR_Planeten-2006.pdf JB-DLR_Planeten-2007.pdf JB-DLR_Planeten-2008.pdf JB-DLR_Planeten-2009.pdf JB-DLR_Planeten-2010.pdf JB-DLR_Planeten-2011.pdf