A Chinese astronaut orbiting 340 kilometers above Earth has given a live video lesson on gravity to school children in China.
ນັກບິນ ອະວະກາດຈີນ ສອນບົດຮຽນ ວິທະຍາສາດ ຈາກອະວະກາດ
![A student looks at his iPad as his class watches a live broadcast of a lecture given by astronauts from the Tiangong-1 space module, at a primary school in Quzhou, Zhejiang province, China, June 20, 2013.](https://gdb.voanews.com/f194f1ef-23a0-4970-b37a-5a336f13cff1_w1024_q10_s.jpg)
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A student looks at his iPad as his class watches a live broadcast of a lecture given by astronauts from the Tiangong-1 space module, at a primary school in Quzhou, Zhejiang province, China, June 20, 2013.
![Students watch a live broadcast of a lecture given by astronauts on the Tiangong-1 space module, at a school in Beijing, June 20, 2013.](https://gdb.voanews.com/7ed074e2-36e5-4887-bf49-07985ac37610_w1024_q10_s.jpg)
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Students watch a live broadcast of a lecture given by astronauts on the Tiangong-1 space module, at a school in Beijing, June 20, 2013.
![The Long March 2-F rocket loaded with the Shenzhou-10 manned spacecraft lifts off from the launch pad in the Jiuquan Satellite Launch Center, Gansu province, June 11, 2013.](https://gdb.voanews.com/68591118-eb0c-48a4-b8d7-5dd36f6256ca_w1024_q10_s.jpg)
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The Long March 2-F rocket loaded with the Shenzhou-10 manned spacecraft lifts off from the launch pad in the Jiuquan Satellite Launch Center, Gansu province, June 11, 2013.
![People watch as the Long March 2-F rocket loaded with the Shenzhou-10 manned spacecraft lifts off, Gansu province, China, June 11, 2013.](https://gdb.voanews.com/dbf264fa-4367-4e31-9cfb-98e90b2948de_w1024_q10_s.jpg)
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People watch as the Long March 2-F rocket loaded with the Shenzhou-10 manned spacecraft lifts off, Gansu province, China, June 11, 2013.