Community Astronomy Night Series (Fall Luminary Walk), 7:30 p.m., Turtle River State Park, 3084 Park Ave., Arvilla, North Dakota. Dabney also was chief ranger for the National Park Service in Washington, D.C. Valerie Naylor, a UND graduate and former superintendent of Theodore Roosevelt National Park, will facilitate the discussion. Sponsored by the Badlands Conservation Alliance, Sierra Club North Dakota, Dakota Resource Council, North Dakota Chapter of the Wildlife Society, North Dakota Natural Resources Trust and the North Dakota Wildlife Federation. Dabney also was chief ranger for the National Park Service in Washington, D.C. Valerie Naylor, a UND graduate and former superintendent of Theodore Roosevelt National Park, will facilitate the discussion. Sponsored by the Badlands Conservation Alliance, Sierra Club North Dakota, Dakota Resource Council, North Dakota Chapter of the Wildlife Society, North Dakota Natural Resources Trust and the North Dakota Wildlife Federation.