I have a pretty good question. I was thinking today how gravity almost makes an "indention" into space time, which is what causes the attraction of other matter. Could it be possible that larger masses in space, like stars and blackholes, create permanent indentions in space/time? Maybe they aren't nearly as "deep" as they would be if the object still existed, but left some kind of indention in the fabric of space? Is this in any ways possible? Have we tested any experiments that could indicate this kind of outcome from large sources of gravity? If something like this could happen, could it be in any way an explantation of "dark matter" or "dark energy." If it does occur, I doubt it has anything to do with dark matter, but just a vague speculation. I know this sounds like a bunch of crazy bs from someone who is not trained in physics, however I think it's a decent idea. I was thinking this because like any other object in space, if a meteor crashes in the land, it damages the surface due the impact. If there is a large collection of mass in a given point, pressing very firmly on the fabric of space/time, could there be ANY type of "damage" done to the fabric after the existance of this object (for example having a massive star collapse into a black hole, over billions of years it dissipates and some kind of evidence is left behind.. or even super novas and the eventual nebula that will form.) Also, could something like this explain the Pioneer anomoly? Just an idea, what do you guys think?