By Lisa Delcour | by hannibal missouri

By Patrick Prokop | Savannah, GA, USA

By GREG REDFERN | Shenandoah National Park, VA

By Nancy Schipono | Interstate 40 near Golden Valley, CA

By kevan hubbard | Oxford, England

By Dr Ski | 9.3°N, 123.3°E

By Dr Ski | Valencia Observatory

By Dr Ski | Valencia Observatory

By Hassan Dadashi.arani | Esfahan.iran

By Hassan Dadashi.arani | Esfahan.iran

By Kandaswamy Natarajan | Chennai Tamilnadu India

By Kandaswamy Natarajan | Chennai Tamilnadu India

By Raul Cortes | Monterrey, Mexico

By Raul Cortes | Monterrey, Mexico

By Niko Powe | Kewanee ill

By Joel Weatherly | Edmonton, Aberta, Canada