Ping Pong in Space #NASA #SpaceExploration #Astronomy #SpaceVideos #ScienceCommunication #STEM

NASA astronaut Scott Kelly, who reached day 300 of his unprecedented year-long stay in space on January 21, 2016, highlights another captivating aspect of life in microgravity. Kelly employs two paddles with water-repellent features to transfer a water sphere between them. The microgravity environment of the space station serves as a vital setting for progressing scientific knowledge across Earth, space, physical, and biological sciences, which would be otherwise unattainable on our planet. The paddles consist of polycarbonate laser-etched surfaces designed as arrays of 300-micrometer posts, subsequently coated with Teflon for a non-wetting effect. This combination of roughness and non-wettability results in a super-hydrophobic surface that resists water adhesion during dynamic processes. The drop's size affects its susceptibility to force – larger drops require less force to break apart, while smaller ones can withstand more impact. Scott demonstrates this using a roughly 4 mL drop, exceeding the size of a raindrop by over 100 times. Further insights into the year-long mission can be found online or through #YearInSpace http://www.nasa.gov/oneyear
This video is public domain and along with other supporting visualizations can be downloaded from the https://www.nasa.gov/
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