3. Discussion and future work 
The achieved result gives a density value of about one order of magnitude greater than the estimated values obtained by other methods. So may be justified since we do not know accurately all the matter and the energy existent in the whole universe.
It’s notable that we do not have obtained a less value that would have invalidated the assumptions we have made.
It is customary to express the density as a fraction of the density required for the critical condition with the density parameter Ω0.
The density parameter Ω is given by:
Ω0 = ρ / ρc
where (ρ) is the actual density of the Universe and (ρc) is the critical density (the average density of matter required for the Universe to just halt its expansion, but only after an infinite time).
This relation determines the overall geometry of the universe.
When the ratio is exactly equal to 1, the geometry of the universe is flat (Euclidean) and contains enough matter to halt the expansion but not enough to recollapse it. If   Ω is less than 1, the Universe is open and will continue to expand forever. If  Ω0  is greater than 1, the Universe is closed and will halt its expansion and recollapse.
The current critical density is approximately (8.62±0.12)×10−27 Kg/m3 = 0.862×10−29 g/cm3
Planck Collaboration (2015). “Planck 2015 results. XIII. Cosmological parameters”
Using the value of ρ = 7.9 * 10-29  to calculate the density parameter  Ω0  we have:
Ω0 = ρ / ρc  = 7.9 * 10-29 / 0.862 × 10-29  = 9.16
With the value of  Ω0  = 9.16 the Universe is closed.