Back

Black Hole Density Question

Any nerdy people want to answer this question? A blackhole has infinite density. If we account for all the matter in the universe including blackholes, would the overall density of the universe be infinite?

Comments (45)

Ingenious, hellooooo, how are youuu

𝓼𝓸𝓷 𝓰𝓸𝓴𝓾

Yo

Yo

to your question no there is uncountable infinity and countable infinity. this is countable

theoretically yes in a general stance, but if you take the density of every single thing in the universe, it would not be as accurate. a more credible stance would be by taking the average density of an area. This would be more useful, as mass is spread out(usually.) A black hole is not defined by having a singularity. A black hole is also defined by having an event horizon. But we also technically have an event horizon (its a bit complicated.) The density of a blackhole may be infinity, but an infinity does not define a finite number. Also, there are theories such as quantum gravity or string theory that are looking for ways to take the infinity out of the equation for a black hole. Things with infinite size can have finite volume.

Also, if you convert the energy of the entire universe (Using the E=mc^2 +dc^2 formula. The dc^2 is the energy gained from relatavistic motions and stuff. If you convert the formula to find the mass of the average blackhole yada yada yada, you can multiply that by the estimated number of blackholes in the universe. That would give you the total mass of blackholes. And then if you transform the total energy in the universe into mass and add that to the known masses of the universe.) You can add the mass-energy to the mass and divide that by the volume of the universe, and voila, the density of the universe. (It depends on whether you are using the volume of the visible universe or the entire universe)

Love your explanation. Thank you

It’s been a while so how are you?

my school is gonna open internship oppurtinues soon, so thats exciting

Im also taking an online astronomy course

Ooh really? How’s it going?

it got a whole ton of math

I mean, space science mostly is just math

Math is like my most favourite subject apart from bio and chem so I’m thinking of going into astrophysics

i prefer the more theoretical stuff because it is literally just math

My classmate is into astrophysics and he’s thinking of joining ESA once he graduates from college

at first i wanted to be an astrophysicist, but i realized that theoretical physics is much more thought provoking, so thats basically why I want to be one

If i asked for yall to do my science hw would you

Anonymous

If i asked for yall to do my science hw would you

not really. I would only guide you through it.