Re: Speed of gravity?
You were aking about the effect if the sun were to disntegrate...Well, I thought you assumed the mass of the sun would also vanish (hypothetically) and therefore, the law of energy conservation would apply and the Earth would go straight ahead. But if there is still a mass at the place of the sun ,then we remain in orbit. If the mass is very much reduced, then our orbit extends outward. Phil is right, the gravity waves travel at the speed of light and would effect the Earth 8.5 minutes after the Sun vanishes.
Raoul