A buoyancy problem involving a ping pong ball, an iron ball, a few strings, some water, and a set of scales is causing a few arguments on Reddit where it was posted. "Where would the scale tip?

An curved arrow pointing right. NASA's Scott Kelly turned a ball of water and two hydrophobic paddles into an out of this world game of ping pong on the International Space Station. Story by Tony ...

Enter the “Pongsat” program – space experiments within a ping pong ball. Created by JP Aerospace, this free program allows anyone to create their own mini experiment and send it off to the ...