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China's second female astronaut, Wang Yaping, has delivered the country's first-ever video lecture from space.
Speaking to students via live video, Ms Wang used spinning tops, a ball, water and a fellow astronaut to explain physics in zero-gravity.
She was speaking from the Tiangong-1 space laboratory, where the Shenzhou spacecraft is currently docked, China's fifth manned space mission, Shenzhou-10, is scheduled to end around 25 or 26 June.
Ms Yang used different experiments to demonstrate the concepts of weight and mass in space.
After showing how normal scales did not work in space, she used a special scale to measure the mass of crew commander Nie Haisheng, using Newton's second law of motion - measuring the mass of an object through force and acceleration.
At another point, to show how objects move in the microgravity environment of space, she asked her colleague to help her rotate 90 degrees, and then 180 degrees, from the floor of the laboratory.
Spinning tops were used to create gyroscopic motion in space, and a ball attached to a string to demonstrate pendulum motion.
Originally posted by StrangeTimez
Every child should be forced to look through a telescope at least once in their lives. The world and universe would be a better place for it.