Radio City Music Hall Rockettes perform after days of rehearsal and routine polished to perfection at the Radio City Music Hall in New York City on July 26, 1949. (Photo by Ivan Dmitri/Getty Images)

Mud Day Queen Riley Tulgetske, left, embraces Mud Day King Phoenix Crowder during Mud Day at the Nankin Mills Park, Tuesday, July 9, 2019, in Westland, Mich. The annual day is for kids 12 years old and younger. While parents might be welcome, this isn't an event meant for teens or adults. It's all about the kids having some good, unclean fun during their summer break and is sponsored by the Wayne County Parks. (Photo by Carlos Osorio/AP Photo)

A giraffe was captured creating a dust cloud while running in front of a perfect African sunset in Amboseli National Park, Kenya in the first decade of November 2022. (Photo by Edgard Berben/Media Drum Images)

Girls in red neckerchiefs dance on Red Square, with the GUM, the State Department Store and the Historical Museum in the background, during a ceremony to celebrate joining the Pioneers organization and 100th anniversary of the All-Union Pioneer Organization, in Moscow, Russia, Sunday, May 22, 2022. Pro-Communist Russians are trying to preserve the Young Pioneers, which used to be the Communist league for pre-teens in the Soviet Union. (Photo by AP Photo/Stringer)

Igor Shpilenok works in the reserve at Kamchatka, Russia. Igor is a fellow of the International League of Conservation Photographers and a winner of the 2006 BBC Wildlife Photographer Competition. Igor’s work has been published in numerous international and Russian magazines, including Smithsonian, National Wildlife, Geo, and BBC Wildlife.

“How does a bear behave when encounter a human? In most cases he runs away. But before running he almost always would rise to stand on his rear feet. And this behavior does not indicate the attack, as many people think...” – Igor Shpilenok. (Photo by Igor Shpilenok via Wildlife Photo Russia)

The brave boy, called Belal and in his early teens, held the young fawn in one hand above his head as he plunged through the surging river to save it. Onlookers watched as the boy waded through the raging river to get to the other side safely. (Photo by Hasib Wahab/Caters News)

A Dalek, a Cyberman and a Silence invade the Melbourne Cricket Ground on February 2, 2012 in Melbourne, Australia. The Doctor Who Daleks this weekend are performing for the first time outside of the UK with the Melbourne Syphony Orchestra at Plenary Hall. (Photo by Scott Barbour/Getty Images for BBC Worldwide)

The competition is run by Royal Observatory Greenwich sponsored by Insight Investment and in association with BBC Sky at Night Magazine. This year astrophotographers from 91 countries sent in more than 4,200 spectacular entries. Here: The Milky Way rises above an isolated lighthouse in Tasmania. Shot by James Stone of Australia. (Photo by James Stone/Astronomy Photographer of the Year 2018)