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It's absurd deliberately calling things don't meet your expectation fake If you are skeptical about the water not “floating“, here are the answers: 1. Velcro underneath the cup, so cup can be fixed on the table 2. Water turns round like a ball only if it's free. Once it contacts with material not very hydrophobic, like the cup in the video, it adheres to the material. That's a result of the adhesive force between water and the cup & that's how water is trapped in the cup. 3 parts of the lecture are now available: Space station tour ; Interactive Q&A Science demonstration ; Please subscribe: Shenzhou-13 crew just completed their first space lecture from Tiangong Space Station on Thursday. Wang Yaping again led the session as the lecturer. Ye Guangfu helped doing demonstrations. Zhai Zhigang mainly did the filming work. The science demonstration included 5 parts: move around in space, Disappearance of buoyancy, Surface tension in water, Optics of water droplet, Effervescent tablets meet water. The taikonauts helped us understand the conservation of angular momentum, origin of buoyancy, surface tension of water, deflection of light across interfaces and more. 神舟十三号乘组完成在中国空间站天宫课堂的第一次授课。王亚平又一次担任讲师，叶光富协助实验演示，翟志刚主要做拍摄工作。实验演示部分包括5个项目，分别为：物体运动、消失的浮力，液体表面张力，水球光学成像，泡腾片实验。航天员通过演示实验帮助我们了解角动量守恒、浮力的起源、水的表面张力、光在穿越不同介质界面是的折射等等。 #Shenzhou13 #SpaceLecture #ChinaSpaceStation #CNSA Follow , , and for updates of China's space exploration programs. Credit: CMS 中国载人航天办公室
