By Radu Anghel | Bacau, Romania

By Tom Wildoner | Weatherly, PA USA

By Tom Marsala | Mojave Desert, CA

By Tom Marsala | Mojave Desert, CA

By Greg Diesel-Walck | Mt Vernon VA

By Deborah Byrd | Austin, Texas

By Deborah Byrd | Austin, Texas

By George Preoteasa | Yellowknife, NWT, Canada

By Jarkko Laukkanen | Eurajoki, Finland

By Zheng Zhi | Beijing, China

By Mary Ellen Croteau | In-flight over Canada

By Abhijit Patil | White Mountains, NH

By Kannan A | Singapore

By Kannan A | Singapore

By William Eagar | San Tan Valley

By Saskia Hostetler Lippy | Mauna Kea Observatories, Hawaii