An armed police officer attends an explosive ordnance disposal training on April 12, 2022 in Nanning, Guangxi Zhuang Autonomous Region of China. (Photo by Yu Haiyang/VCG via Getty Images)

A Delhi Police officer stretches during a rehearsal for the upcoming Republic Day parade on a foggy winter morning in New Delhi, India on January 4, 2024. (Photo by Sahiba Chawdhary/Reuters)

Female police officers, Carabineras, march during the annual military parade to celebrate Independence Day and Army Day in Santiago, Chile on September 19, 2024. (Photo by Matias Basualdo/ZUMA Press Wire/Rex Features/Shutterstock)

A protestor is detained following the grand jury verdict on September 23, 2020 in Louisville, Kentucky. Protesters marched in the streets after a Kentucky grand jury indicts one of the three officers involved in the killing of Breonna Taylor, who was fatally shot by Louisville Metro Police officers during a no-knock warrant at her apartment on March 13, 2020 in Louisville, Kentucky. (Photo by Brandon Bell/Getty Images)

Kashmiri woman takes part in a physical test of a recruitment rally for the Special Police Officers (SPO) in Jammu and Kashmir Police, in Srinagar on December 6, 2019. As many as 23,000 people have applied for posts in the Special Police Officers (SPO) in Jammu and Kashmir Police and 100 positions will filled in the current phase of recruitment, local authorities said. (Photo by Tauseef Mustafa/AFP Photo)

The CBRE Urban Photographer of the Year competition – now in its ninth year – encourages professional and amateur photographers to capture cities at work. Here: Dog Walker – 15:00. The competition allows photographers to enter up to 24 images, one representing each hour of the day. (Photo by Johanna Siegmann)

A photographer tested the concentration of several pairs of dogs as he captured their reactions to treat time in a series of shots. Christian Vieler, 47, of Waltrop, Germany, has been a professional dog photographer since 2016. He came up with the idea of snapping two dogs catching treats simultaneously. Here: Basset Hounds. (Photo by Vieler Photography/Caters News Agency)

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.