The rudiments of a theory of dark energy. The theoretical result is confronted with the numerical value calculated from the available data. Excellent matching of numerical values resulting in three independent paths makes the approach plausible. The work at hand is analogous to Kepler's laws of planetary orbits. Only Isaac Newton put Kepler's laws on a theoretical basis, which is provided here by Thomas Gornitz. The derivation of a formula for calculating dark energy is described. The result is tested on the basis of the available data from the Max Planck Institute for Radio Astronomy. Further formulas are deducted. The dark matter of the cosmos is calculated. A balance sheet is drawn up. Conclusions are drawn. The empirical Balmer formula for the frequencies of the spectral lines in the arc spectrum of hydrogen was also theoretically justified by Niels Bohr, who calculated the energy levels of the hydrogen atom and the frequencies of spectral lines
