French_Fried said:
What is the speed of gravity?

depending on how you think of it, up to the speed of light (or possibly even greater)

if you're sitting on an event-horizon and accelerate up to what would be the speed of light in the opposite direction, you'll be stationary
(but zooming through time at sqrt(2) seconds per second, i think?)

i say possibly greater because if you pass the event horizon you'll still be moving towards the gravity even if you have that speed-of-light momentum

@bipface: If (hypothetically) I planet we’re to instantaneously appear in front me, how long would it take for the field of gravity to affect me?

Since gravity has no mass, I see no reason why it shouldn’t be faster than the speed of light