By Rui Santos | Vila Velha de Ródão, Portugal

By Teresa Molinaro | Etna, Sicily, Italy

By Paul Beinecke | Johnston, Iowa USA

By Hassan Dadashi . Arani | Esfahan province. Iran

By Christopher Sjokvist | Dunedin, Florida

By Susan Greive | Hutchinson Island, Florida

By Hassan Dadashi . Arani | Esfahan province. Iran

By Steve Price | Draper, UT USA

By Randy Strauss | Suburb of Omaha, Nebraska

By Nanci McCraine | Central New York

By John Ashley | Rio Rico, Arizona, USA

By Jim Militello | Tucson, Arizona USA

By Muafak Bisher | Desert of Negev

By Dolores Moreno | Highland, CA

By Filipp Romanov | Siding Spring Observatory, Australia

By Alexander Krivenyshev | Manhattan, New York