Welcome to the forum Josh.
Originally posted by Josh The Curious
@Jan 6 2005, 03:15 AM
suppose the sun just disappeared... I was wondering if the Earth would continue on a straight path from where it was before the light last emitted by the sun reached the Earth.
That is the current theory, but we haven't been able to test it yet.
Concerning gravity waves, this would be a simple case that would demonstrate a gravity wave. There are some complicated aspects to gravity waves, so it isn't really that simple. They transmit energy, so in the case of the Sun just disappearing, where did that energy come from?
At the moment, it seems unlikely that a change in gravity [say when two massive objects collide, or one massive object explodes] could be detected faster than the speed of light. It is possible that it goes slower than the speed of light.
Forming opinions as we speak