So let's say we have a neutron star. A neutron star is very massive and very dense therefore it has a very strong gravitational field. But also it is rotating very fast and it really hot. This means it has more energy than if it was stationary and cold. Of course if this neutron star has more energy its gravitational field strength must also be stronger. I'm wondering by how much? If you could give me some formulae that would be great :D P.S. first time writing. Sorry for my bad English I'm not a native speaker.