Fundamental questions in astrophysics and cosmology such as the matter to antimatter asymmetry (baryon asymmetry) in the universe or  the existence of dark matter are thought to be closely linked to particle physics. For example, the baryon asymmetry of the universe can be explained by models of leptogenesis, which require special properties of neutrinos. And the as yet unknown dark matter presumably consists of particles that require physics beyond the standard model of particle physics.

This question can be investigated using search and precision experiments in (astro) particle physics at low energies. In this lecture, this will be illustrated by three examples: The search for neutrinoless double beta decay, the direct search for the neutrino mass and the direct search for dark matter. These searches will be explained using specific experiments, such as the KATRIN and XENONnT experiments, as well as the respective perspectives for the future.