Technocosmos, later renamed Technostar, was an 85-metre (279 ft) tall giant Ferris wheel that was built for the Expo '85 World Fair in Tsukuba, Ibaraki, Japan. It carried almost 3 million passengers during the exposition. Technocosmos had an overall height of 85 metres (279 ft), a diameter of 82.5 metres (271 ft), and took 15 minutes to complete a revolution. Each of the 48 passenger cars could carry 8 people and was equipped with solar panels to power its air conditioning.