What is the mass density of the universe?

Question

What is the mass density of the universe?

Answer 1

the mass density of the universe is calculated as

really fu..kin huge!

Answer 2

there is no answer to that. mass and energy r continuously being converted to each other.

Answer 3

8639286948649362186349^88329649862946892... kilo tons... in other words.... ALOT!!

Answer 4

I would guess something in the neighborhood of 1 x 10^∞ gm/c³.

Answer 5

I don't think it's possible to calculate that. There's too many things about the universe that we don't understand, such as when and if it ends. If the universe is unlimited, than the universe cannot have any definitive density because it has no specific volume.

Answer 6

The present radius of the universe is calculated to be = 3 × 10^26 meters.  From V = 4/3 pi R^3 the volume should be = 1.13 x 10^110 m^3

The density of the universe is calculated to be = 2.11 × 10^-29 kg/m^3

(about one hydrogen atom in 50 cubic meters of space)

Now we can calculate the mass of the universe...

M = D x V

= (1.13 x 10^110 m^3) x (2.11 x 10^-29 kg/m^3)

= 2.329 x 10^81 kg

(heaver than your average bear)