The absolute calibration of the UBV system. ... The two-colour diagram from Carroll and Ostlie. ... zero-age main sequence (ZAMS) for solar metallicity stars. ...
1. Examine the various techniques used to establish distances to galaxies, ... galaxies has produced a value of H0 = 72 8 km s 1 Mpc 1 (Freedman et al. 2000) ...
12. Star Count Analysis (see Mihalas & Routly, Galactic Astronomy) Define, for a particular area of sky: N(m) = total number of stars brighter than magnitude m per ...