By Leslie Scopes Anderson | Arches NP, UT

By Arya Jayatilaka | Warren Dunes, Michigan

By Hassan Dadashi.arani | Esfahan.iran

By Dr Ski | Valencia Observatory Garden

By Dr Ski | Valencia Observatory Garden

By Arundev KR | Quito, Ecuador

By Arundev KR | Quito, Ecuador

By Faiz Ahmad | Virginai, USA

By Tom Marsala | Mojave Desert, Calif

By Tom Marsala | Menifee, Calif

By Giacomo Asta | Turin, Piedmont, Italy

By Kristopher Schoenleber | Emerald Lake in Yoho National Park, British Columbia, Canada

By Dr Ski | Valencia Observatory

By Helio Vital | Rio de Janeiro, Brazil

By Peter Lowenstein | Mutare, Zimbabwe

By Peter Lowenstein | Mutare, Zimbabwe