Captain Kirk Sends Message into Space, Gets a Response

Commander Chris Hadfield, a Canadian astronaut, is currently on the International Space Station. He got a tweet from James T. Kirk, the actor who played William Shatner on Star Trek. Hadfield showed the captain the respect due to him by rank and reputation.

Link -via io9


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More informative than I expected from the summary I've seen in a couple places so far.

One caveat is that at distances larger than the size of a magnet, the force will start to drop off as 1/r^4, which is really fast. If you had an unobtainium small magnet that can pick up a car at 10 cm, it would struggle to pick up a paperclip at 3 meters.
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