Police officers detain an activist to prevent her from marching in a pride parade, which was banned by local authorities, in central Istanbul, Turkey on June 26, 2022. (Photo by Umit Bektas/Reuters)

A woman wears a face mask in the part of the city near neighbourhoods known for burning coal for heating in Ulaanbaatar, Mongolia January 26, 2017. Not many people in Ulaanbaatar wear masks to protect themselves against pollution. (Photo by B. Rentsendorj/Reuters)

A theater company performs “Insectes” during Santiago a Mil International Theater Festival in Santiago, Chile on January 12, 2023. (Photo by Ivan Alvarado/Reuters)

Women perform square dancing at a park square in Beijing, China, April 9, 2015. Chinese-style square dancing is running circles around other hobbies for the elderly, with millions taking to parks and plazas across China, swivelling their hips and rolling their arms – but it's not to everyone's liking. (Photo by Kim Kyung-Hoon/Reuters)

Travel concept: commercial airplane flying with beautiful charming stewardess on September 12, 2019. (Photo by Volodymyr Tverdokhlib/Alamy Stock Photo)

The opening of sculptor Carole Feuerman solo outdoor public art show, Sea Idylls, on Park Avenue in NYC on April 27, 2023. The hyperrealistic sculptures in conjunction with Les Galeries Bartoux and Patrons of Park Avenue line the median. (Photo by Milo Hess/ZUMA Press Wire/Rex Features/Shutterstock)

Timbuktu: A UN peacekeeper from Burkina Faso stands guard at the Djinguereber mosque, built in the 14th century, during a visit by a UN delegation on election day in Timbuktu, Mali, July 28, 2013. (Photo by Joe Penney/Reuters)

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.