Weekly Astronomy Seminar - Tracing Gas in Galaxies Near and Far

While the stellar populations of galaxies gives insight into their past, determining their gas content is vital to understand their future growth. In the nearby universe HI observations have shown us the gas distribution of galaxies far outside their optical disk, yet becomes difficult to detect in the distant Universe. Here I will talk about determining the total gas mass in galaxies near and far, and concentrate on on how we can determine their gas mass at all redshifts through a common associate, dust.