Advances in Understanding Astrophysical and Atomic Phenomena

strophysical phenomena have fundamental connections to atomic phenomena—either directly or through various analogies. Theoretical and observational studies of dark matter, dark energy, the early Universe, black holes, and other large structures related to cosmology, as well as of small- and medium-size structures, such as the solar system, stellar dynamics, and galaxies, and gravitational waves, continue to be at the forefront of astrophysical research. Atomic and molecular physics currently has a broad scope of theoretical and experimental studies, including (but not limited to) atoms and molecules in various external fields (including laser fields), electronic and ionic collisions, electronic correlations in nanosystems, laser cooling of atoms and Bose–Einstein condensates, atomic processes in plasmas, chaotic phenomena in the micro-world, and quantum computing and information. This Special Issue welcomes presentations of new theoretical and experimental results in all areas of astrophysics and cosmology and all areas of atomic and molecular physics. This Special Issue also welcomes reviews (full-size or mini-reviews) on any sub-field of these broad research areas.