$\star$ Black energy and future of the universe: Is the universe really expanding infinite?

The presence of $\Omega_{\rm X}$ implies that the future of the universe is not determined any more by the only geometry, a closed universe can have an eternal expansion under the influence of $\Omega_{\rm X}$.

In the current paradigm the universe should continue to extend exponentially. The visible universe will be in a future distance made up of the hundred galaxies which make our local cluster.

However, the universe can again know a period of domination by the matter if $X$ disintegrates in particle to create a negative effective cosmological constant.