The competition, which is run by the Royal Observatory Greenwich in association with BBC Sky at Night Magazine, is now in its sixth year and has received over 2,500 entries. Photo: Centre of the Heart Nebula by Ivan Eder (Hungary). Situated 7500 light years away in the “W”-shaped constellation of Cassiopeia, the Heart Nebula is a vast region of glowing gas, energized by a cluster of young stars at its centre. The image depicts the central region, where dust clouds are being eroded and moulded into rugged shapes by the searing cosmic radiation. (Photo by Ivan Eder)

A young man with an amputated leg poses for a photograph standing by his broken artificial limb in the rebel-controlled area of Maaret al-Numan town in Idlib province, Syria March 20, 2016. Two university students forced to interrupt their studies have learnt to make and fit hundreds of new limbs in the past four years in opposition-held areas of Syria. A mobile clinic operating from a truck has gone some way to improve access to treatment. While most patients are between 15 and 45, the clinic also helps children and the elderly with replacement limbs. (Photo by Khalil Ashawi/Reuters)

A visitor looks at portraits of Mao Zedong amid his statues on display at a wholesale souvenir store in Shaoshan, Hunan Province in central China, 28 April 2016. Shaoshan is the hometown of former Communist leader Mao Zedong, popularly known as Chairman Mao. Thousands of visitors descend on this small Chinese town burrowed in the hills of Central China's Hunan province to pay homage to the “Great Helmsman” everyday. It is one of the core sites of the “Red Tourism” industry, where communist party cadres and ordinary Chinese tourists alike seek to relive the experiences and rekindle the spirit of the revolutionaries. (Photo by How Hwee Young/EPA)

In this January 23, 2021, file photo, a police officer detains a young woman during a protest against the jailing of opposition leader Alexei Navalny in Pushkin square in Moscow, Russia. Allies of Navalny are calling for new protests next weekend to demand his release, following a wave of demonstrations across the country that brought out tens of thousands in a defiant challenge to President Vladimir Putin. (Photo by Alexander Zemlianichenko/AP Photo/File)

A woman walks by a bank's currency advertisement board in Seoul, South Korea, Friday, September 23, 2022. Asian stocks fell for a third day Friday after more rate hikes by the Federal Reserve and other central banks to control persistent inflation spurred fears of a possible global recession. (Photo by Ahn Young-joon/AP Photo)

Commuters travel in an overcrowded train near a railway station at Loni town in India's state of Uttar Pradesh on April 24, 2023. India is set to overtake China as the world's most populous country by the end of June, UN estimates showed on April 19, posing huge challenges to a nation with creaking infrastructure and insufficient jobs for millions of young people. (Photo by Arun Sankar/AFP Photo)

A child gets his head shaved by a Buddhist monk during a ceremony to prepare children to live as Buddhist monks for three weeks at Jogyesa Temple on May 09, 2023 in Seoul, South Korea. As part of the celebration of Buddha's birthday, young children are annually invited to become Buddhist monks for a three-week period. (Photo by Chung Sung-Jun/Getty Images)

Three young women sprint for cover after getting caught but they were laughing with joy. Fun for some – not so much for others. Leaping over and into puddles. Torrential rain and lightning and thunder in North London Highgate on August 17, 2022. Storm drenched people out and created huge puddles for traffic People ran to escape. (Photo by Gavin Rodgers/Pixel8000)