Dark Energy, a Summary

The accelerated expansion of the Universe, described by the term Dark Energy, is one of the most important open questions in Cosmology today. This mysterious Dark Energy comprises about 70 % of the Universe and all the available data to date favors the notion that it is a Cosmological Constant. We will review the current status of the experimental data on Dark Energy and provide a short description of the upcoming experiments poised to shed light on this problem.