A novel approach for weighing galaxy clusters
Galaxy clusters trace the matter density of the universe, and by counting clusters as a function of mass and redshift, cosmologists can learn about the expansion rate of the Universe
Galaxy clusters trace the matter density of the universe, and by counting clusters as a function of mass and redshift, cosmologists can learn about the expansion rate of the Universe
Astronomers study light, but as it turns out, not all objects that we are interested in are observable in any part of the electromagnetic spectrum. In cases such as these, we have to turn to indirect detection methods.