Phenomenology of the Invisible Universe

Understand

Cosmology is operating now on a well established and tightly constraining empirical basis.

• The relativistic LambdaCDM hot big bang theory is consistent with all the present tests; it has become the benchmark.
• But the many open issues in this subject make it reasonable to expect that a more accurate cosmology will have more interesting physics in the invisible sector of the universe, and maybe also in the visible part.