I am new to the forum and find it enjoyable and informative reading the discussion threads. As I am new, this topic may have been covered and discussed earlier, but I could not find a discussion link. So I apologize in making errors in getting familiar using the site.
In an astronomy TV program or podcast I recently saw, there was a comment that the gravity interaction between planets, galaxies’, etc. is instantaneous. Gravity interactions are faster than the speed of light...all mass in the universe is in constant contact with all other mass in the universe.
This topic intrigues me as I never before considered or thought about the time it takes for the gravity of one mass to communicate with the gravity of another mass. I ask for your thoughts on the topic and any references on the subject you could recommend. Thanks.