By Dr Ski | Valencia Observatory

By Dr Ski | Valencia Observatory

By Jack Pope | Clay Wildlife Management Area, Nicholas County, Kentucky, USA

By Dr Ski | Dumaguete, Philippines

By Dr Ski | Dumaguete, Philippines

By G. Turlock | Stony Plain, Alberta CANADA

By Nancy Spina | Boca Raton, FL, USA

By George Turner | Routt County in Northern Colorado

By Rui Manuel Antunes Silva | Coja, Coimbra, Portugal

By Steven Sweet | Port Credit, Mississauga, Ontario Canada

By RAJAT KUMAR PAL | Robert Moses State Park Field 2

By Kandaswamy Natarajan | Chennai TamilNadu India

By Kandaswamy Natarajan | Chennai TamilNadu India

By Niko Powe | Kewanee ill

By Dr Ski | Valencia, Philippines

By Mary T. McClelland | Glacier National Park, MT