E=mc2 says that mass and energy are interchangeable. to make interstellar space flight possible artificial gravity must be generated. assuming that energy generation is not a factor, according to the equation given sufficient energy a gravity field could be generated. most everything that i've read regarding artificial gravity says that a superdense core of some sort is needed. since mass and energy are essentially the same thing, again assuming energy generation is not a factor, wouldnt it be possible to focus energy on a single point sufficient enough to generate 1g aboard the vessel? there are many variables that i did not discuss and everything i said is theoretical, i just want some feedback on the idea.