3 ms·

Gravity propagates at the speed of light, too.

• swamp40 13y ago
  I think that's a debatable topic. Some say it is just a pure geometric effect of curved space (and thus instantaneous), not a force of nature that propagates.
  • chrischen 13y ago
    Then we can tug on gravity to send signals instantaneously!
  • danbruc 13y ago
    http://en.wikipedia.org/wiki/Speed_of_gravity http://en.wikipedia.org/wiki/Speed_of_gravity
  • wiml 13y ago
    The pure geometric effect propagates at light speed also (unless you want to discard relativity).