# If you transformed a large amount of energy into a large mass, would the attractive force of the mass emanate from the source like ripples in a pond?

Newton gave the formula for the attraction between two masses, which includes mention of the distance between the masses but doesn't specify a maximum distance, which leads me to believe that masses on the other side of the universe have an attractive force on me. Question is, supposing you could create some large mass, would the effects of it's attracting forces emanate from the source like ripples in a pond? As I've learned the effects of a field emanating from an oscillating charge would do so. For example, if you transformed a lot of energy into a massive object would the effects of it's attractiveness spontaneously manifest everywhere in the universe?...I realise that Newtons formula was corrected by Einstein, I'm not aware of how general relativity works exactly, but my question doesn't seem too silly to me at the moment. I realise that if a signal can be sent faster than the speed of light then there has been a mistake in my reasoning/mathematics, just curious as to what the mistake is. (If the attractive force were to manifest everywhere in the universe instantaneously, it would seem this happens faster than c?

The original amount of energy already has mass, from $$E=mc^2$$, so there wouldn't be a sudden change in the gravitational attraction towards the place where the energy was.