Science off the Sphere
Astronaut and chemist Dr. Don Pettit does physics demos that are out of this world. Currently on board the International Space Station, Dr. Pettit presents fantastic physics that can only be demonstrated in micro-gravity.
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Science off the Sphere Challenge
Join the fun! Participate in the Physics Challenge. At the end of each video Dr. Pettit poses a challenge question.
Submit your answers below for a chance to have your name read from space and receive a snazzy t-shirt from Earth.
Challenge #2 Question: