In this "universe is inside a black hole" theory, is mass 1-to-1 with the "parent" universe? In this theory, are we inside a black hole containing billions of galaxies worth of matter?
An average black hole has 50 suns in it, 50 times the mass of our star, that would be a universe without much matter.
To preface, this is not my field (space stuff is just an interest of mine), and this specific theory is more on the fringes than most so I haven't spent a significant amount of time thinking about it.
>is mass 1-to-1 with the "parent" universe? In this theory, are we inside a black hole containing billions of galaxies worth of matter?
My understanding of the theory is that the proposed parent black hole which our universe is inside would necessarily have to contain all of the mass that we detect in our observable universe. So our universe would be 1-to-1 mass of the parent black hole. The parent universe would be larger (and may contain many black holes, each with a nested universe).
>An average black hole has 50 suns in it, 50 times the mass of our star, that would be a universe without much matter
Indeed! It's interesting to think that perhaps we are on one of the "lowest" layers of the nested multiverse, and perhaps there are only a few dozen (or whatever) layers below us until there is too little mass in that universe to create any more black holes. However, there could be an infinite amount of layers "above" us.
I am curious to where the 50 solar-mass figure comes from, though. Is this excluding super-massive and ultra-massive black holes (which are on the order of 10^6 to 10^11 solar masses)? My intuition says 50 solar-masses is orders of magnitude too low for the average mass of a black hole, but I've never really looked into it
An average black hole has 50 suns in it, 50 times the mass of our star, that would be a universe without much matter.