A special lecture on the properties of gravity was given to a group of Beijing students by astronauts onboard China's first experimental space lab orbiting about 340 km above earth on Thursday, state media reported. The three astronauts were sent to space on the Shenzhen 10 spacecraft for a 15-day mission on June 11, and docked with the space module Tiangong (Heavenly Palace) 1 on June 13.moreless
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