By Michael Davis | Grand Lake, Colorado, U.S.A.

By Victor C. Rogus (FRAS) | Sedona, Arizona

By Victor C. Rogus (FRAS) | Sedona, Arizona

By Karthik Easvur | Hyderabad, India

By Rita Raina | Rockville, MD

By Victoria Bryhan | Corvallis, Oregon, US

By Chuck Reinhart | Vincennes Indiana

By Dr Ski | Valencia, Philippines

By Dr Ski | Valencia, Philippines

By Kannan A | Singapore

By Kannan A | Singapore

By Fabio Arce | Xalapa, Veracruz, Mexico

By DONALD HARTH | wax-moon/ International Space Station

By Ragini Chaturvedi | Freehold, NJ, USA

By Gina Cornett | Louisville, ky

By Ragini Chaturvedi | Freehold, NJ, USA