Amateur astronomer Bill Snyder has been involved with astrophotography since 2007. Photo: The Cygnus Wall is in the southern area of NGC7000 also known as the North America Nebula. It is approximately 1800 light years from Earth, and is in the constellation Cygnus. The Wall is an energized shock front and contains the most concentrated star formations in the nebula. The size of the North America Nebula is about 4 full moons. (Photo and caption by Bill Snyder)

An Iraqi girl, who fled from Falluja because of Islamic State violence, poses for a photographer at a refugee camp in Ameriyat Falluja, south of Falluja, Iraq, June 16, 2016. (Photo by Ahmed Saad/Reuters)

A man poses for a picture to show his rings of gold, silver and bronze on his fist in Zamfara, Nigeria April 21, 2016. (Photo by Afolabi Sotunde/Reuters)

The Christian Cowan Fall/Winter 2022 collection is modeled at the One World Trade Center during New York Fashion Week on Friday, February 11, 2022, in New York. (Photo by Charles Sykes/Invision/AP Photo)

A guest arrives outside the Anna Sui show at the Strand Rare Book Room in New York on February 10, 2024. (Photo by Jeenah Moon for The Washington Post)

Halsey performs at Night Two of BUDX Miami by Budweiser on February 02, 2020 in Miami Beach, Florida. (Photo by Noam Galai/Getty Images for BudX)

SpaceX and NASA Launch of the PACE spacecraft atop a Falcon 9 rocket from Launch Complex 40 at Cape Canaveral Space Force Station in Brevard County, Florida on February 8, 2024. Photo shows launch and booster landing back at CCSFS about 7 minutes 30 seconds after launch. In the foreground is one the new modular lifeguard stands at Minuteman Causeway, replacing the old wooden tower. (Photo by Malcolm Denemark/Florida Today via USA Today Network)

The Royal Observatory just announced its Astronomy Photographer Of The Year 2013 winners. Australian photographer Mark Gee was chosen among a thousand amateur and professional photographers around the globe to win the top title. His work is part of an exhibition of the winning photographers, which opened on Sept. 19 at the Royal Observatory Greenwich. The Royal Observatory shared with us the winners and notable mentions of the competition. Their descriptions of the prizewinners can be found below the images.