GALACTIC ASTRONOMY introduces all astronomical concepts necessary to understand the properties of galaxies, including coordinate systems, magnitudes and colors, the phenomenology of stars, the theory of stellar and chemical evolution, and the measurement of astronomical distances. 100 photos.... candle and those derived from planetary-nebulae luminosity functions (As7.3.2) revealed satisfyingly identical results. ... As we discussed at the beginning of this chapter, the most secure absolute distance estimates have traditionally been ... using a whole series of techniques for estimating relative distances, in order to construct the complete cosmic distance ladder. ... Unfortunately, different combinations of distance estimators have produced radically different answers: the Hubbleanbsp;...
|Author||:||James Binney, Michael Merrifield|
|Publisher||:||Princeton University Press - 1998|