Much can be learned about galaxies from astronomical imaging, because their appearances are determined by how they formed and evolved.
Decades of observational data and careful modeling show that stars dominate the gravitational field of the inner 2-3 half-mass radii of globular clusters.
The last few years have seen an unprecedented growth in all the aspects of gravitational-wave (GW) astrophysics. At the frontier is population modeling of GW sources and their potential progenitors: massive stars in binary systems.
When and how does environment impact the evolution of galaxies? We will approach this question by considering two extreme environments. First: The cores of massive clusters. Here, the largest, reddest galaxies of the local universe are found, Brightest Cluster Galaxies (BCGs).
