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.

“News of a ceasefire is greeted by wild celebrations on the streets of Gaza, whilst Israeli residents of Jerusalem and Tel Aviv are more cautious in their support for the peace deal”. – Reuters

Photo: Palestinian gunmen hold a poster of late Ahmed Jabari, head of the Hamas military wing in Gaza City, while they celebrate the cease-fire agreement between Israel and Hamas in Gaza City, Wednesday, November 21, 2012. Israel and the Hamas militant group agreed to a cease-fire Wednesday to end eight days of the fiercest fighting in nearly four years, promising to halt attacks on each other and ease an Israeli blockade constricting the Gaza Strip. (Photo by Adel Hana/AP)

A chimpanzee relaxes in the shade at the Safari Park as the popular attraction prepares for the upcoming Jewish festival of Pesach (Passover) on April 14, 2008 in Ramat Gan near Tel Aviv, Israel. (Photo by David Silverman/Getty Images)

Residents watch the ocean waves crash into the water front, after the passage of Hurricane Irma, in Cuba, Sunday, September 10, 2017. (Photo by Ramon Espinosa/AP Photo)

“A Mothers Tail”. A baby cub pulls on his mother's tail to get attention. Photo location: Masai Mara, Kenya. (Photo and caption by Tori Marsh/National Geographic Photo Contest)

Sri Lankan military personnel march during the country's 66th Independence Day celebrations in the central town of Kegalle, about 40 kms from the capital Colombo on February 4, 2014. Sri Lanka cemmemorates its independence from British rule on February 4, 1948. (Photo by Ishara S. Kodikara/AFP Photo)

In this February 5, 2014 photo, Divaldo Aguiar, who plays the part of Pachencho, is carried in a mock coffin during the Burial of Pachencho celebration, through a cemetery in Santiago de Las Vegas, Cuba. Cuban villagers stage a mock funeral and burial of Pachencho, with a living man playing the part of Pachencho, in a boozy festival that has become an annual tradition in this small town near Havana, held each February 5 for the last 30 years. (Photo by Enric Marti/AP Photo)