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Regarding to the speed of information.

  1. May 30, 2015 #1
    If the sun suddenly vanished, hypothetically ceased to exist. Would the earth still continue on its circular path for 8 min 20 sec? and then leave its orbit tangentially?
  2. jcsd
  3. May 30, 2015 #2

    Simon Bridge

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    Basically - yes.
    Otherwise moving a massive object about could be used for FTL communication, violating causality.

    (There's a lot of other stuff, but I know what you are asking.)
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