
$$
\Omega_{\rm vis} \sim 0.03 \thinspace \Omega_0
$$

$$
\Omega_{\rm vis+dark} \sim 0.3 \thinspace \Omega_0
$$

$$
\Omega_{\rm grav} \sim 3 \times 10^{-31} \thinspace {\rm g/cm^3}
$$


$$
\Omega < \Omega_0
$$

$$
\Omega > \Omega_0
$$

$$
\Omega_0 = 1
$$

\bye
