Kelly, who will spend a year at the International Space Station, celebrated his 300th day in outer space by posting a video of the ping-pong-like discovery on his Facebook page.

In the video, Kelly tosses a ball of water between two super-hydrophobic polycarbonate paddles. According to the 51-year-old astronaut, the paddles' material repel water much like a rain coat, allowing the water to bounce off the surface of the paddles.

Kelly has also documented amazing photos from space of storms, the northern lights and a flower he grew inside the spacecraft.

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