The Properties of Nuclear Star Clusters and their Host Galaxies
  Nuclear star clusters are found at the centers of most galaxies. They are the
densest stellar systems in the Universe, and thus have unique and interesting
stellar dynamics. We review how common nuclear star clusters are in galaxies of
different masses and types, and then discuss the typical properties of NSCs. We
close by discussing the formation of NSCs, and how a picture is emerging of
different formation mechanisms being dominant in lower and higher mass
galaxies.
