And yet, said Baade, “It took hard detour before flashed the light of truth.” Moreover, because sharp differences between the diagrams of globular clusters from the standard color chart – luminosity Shepley were installed in the late teens of xx century. All globular clusters are the brightest stars are red giants, the luminosity of whom grew up with show an increase in Baade cover a small part of the visible shtoschad galaxy. Systematic photography continued for several years; plates were studied by Baade with G. Suop and S. Gaposhkin, and the results were published after his death Baade, followed in 1960 in these four fields have been found over 600 Cepheids, and in the near to center field, they make up a third of all the variables, and in more remote areas, falling to bright spiral arms – two-thirds. These Cepheids have been very useful in studying the structure of the branches.
Until now, there are disputes not only about the number of arms in M 31, but even the direction of twist, though, in my opinion, even from Fig. 42 (And from data on the H I in the outer regions) that spiral away from the core parameters clockwise and, as the galaxy rotates in the opposite direction, they spin. In any case, the localization of many segments of arms straightforward, and details of their structure can therefore be compared with the predictions of wave theory sleeves. Andromeda galaxy is often considered as an analogue of the Milky Way galaxy, but also between them and a lot of differences, starting with the fact that the central region of M 31 is much quieter – at least for now – than in our Galaxy, in which there are no signs of star formation, or the expiration of the substance. Distribution of hydrogen in general seems in both galaxies – and the atomic and molecular hydrogen in M 31 there are no closer to 6 – 7 kpc from the center, it is as comparable to the frequency of outbreaks of new stars, the number of globular clusters (talking about the high proportion of old people concentrated toward the center), and tight twisting spirals can be classified either as a spiral galaxy class 8b. However, the process of star formation in the Milky Way is now much more actively than in M 31, and we
There are several dozen regions of H ii, a bright and extended than the largest one in M 31; this is an argument for the fact that the Galaxy is closer to 8c. Masses of both galaxies appear to be close. The Andromeda Galaxy and our own galaxy – the most striking and robust members of the small clusters, numbering about 30 members and known as the Local Group. In these two systems, concluded”0% of the total mass of the cluster. Two-thirds of the members of the Local Group – dwarf elliptical galaxies like the four satellites of M 31 and the systems in Sculptor and furnaces. It includes small spiral galaxy M 33 in the triangle (Fig. 52), and several irregular galaxies – Magellanic Clouds, 1CHOS 6822.1 from 1613, and others. The number of dwarf galaxies and local groups can be much more: Berg recently discovered three new satellites of M 31 – system of the type of Sculptor.