All the known matter and energy, both normal and dark, only gives us an $\Omega _ { 0 }$ of about .3.

Question

Quizplus · Accepted Answer

The current consensus among cosmologists is that the total $\Omega_{0}$, which represents the total density of the universe including normal matter, dark matter, and dark energy, is very close to 1. This suggests a flat universe. The value of about 0.3 is typically associated with the density parameter for matter (both normal and dark) alone, not the total $\Omega_{0}$ which also includes dark energy.

All the Known Matter and Energy, Both Normal and Dark Ω0\Omega _ { 0 }Ω0​

All the Known Matter and Energy, Both Normal and Dark $\Omega _ { 0 }$