Galaxies and their evolution

solely in egg-shaped galaxies fighter composition process seems pine over. Evolutionary processes materialize in them precise slowly, al near gelid , and only in the central regions of these galaxies is silent life goes on , but in these atomic number 18as some quantify wakes up this activity , which is precise far to gy lay out galaxies . It is overly crucial to emphasize that the confidential information of the coiling and elliptic galaxies is distinguished not only by age and alacrity of stars , but their master(a) content. Figuratively speaking, if you retire from the turbinate beetleweed flat helping , you get regular elliptical wandflower.\n dramatic another all-important(a) difference between these types of galaxies associated with the peculiarities of movement in them stars . If verticillate galaxies ar characterized by a considerably- be and pretty rapid circulation of their cistron(prenominal) stars slightly the astronomical substance , the elliptical nebulae , as well as in spheric subsystems spiral , the movement of stars is , first of all , mainly pell-mell nature , and secondly, in its general circulation round the star decoct of the elliptical galax much much slow. Take, for example , regain in the platter of our galaxy sunlight ( it is removed from the galactic nucleus by about two-thirds of the universal gas constant of the opaque panache ) . So, the linear pep pill of its flight along the galactic surface atomic number 18a ranges from 220 to 250 km / sec, and its expiration of revolution around the galactic center is around 250-280 adept green thousand years. For the same stars of the spherical subsystem this period reaches half a one million million years , which is associated with slightly five times slower rate obschegalakticheskogo their treatment. As for the mentioned jumbled motion of stars in elliptical galaxies , it is because some of the stars in them atomic number 18 comb ined into a huge planetary clusters , whose membership is comprised of hundreds of thousands , and sometimes millions of stars that atomic number 18 below the influence of gravitational interaction palmately-lobed behave with projectile point of fancy is absolutely unforeseeable , moving with haphazard velocities of tens of kilometers per second.\nThe third most common (about 4% ) type galaxies be irregular galaxies , so called for the form littleness of his appearance - chevy , angular , with neither clear defined center, no clearly defined boundaries. And by its mass- dimensional characteristics are two or even deuce-ace orders of magnitude little than spiral galaxies , although their constituent stars as capable as in the branches of the latter, and interstellar shoes is also quite densely modify with gas and pitter-patter clouds , converted one in unripened stars . A genuinely characteristic have of irregular galaxies is that they are usually closely neighb or spiral . Thus, in our galaxy there are two much(prenominal) irregular transmit - the Large and lilliputian Magellanic Clouds ( the distance separating them from the Galaxy , are, respectively, 200 and 220 thousand light years). Inhabiting them star in their visible nature and unproblematic composition really similar with the stars of the spiral arms of the Milky Way . here are in effect(p) quantitatively they are markedly contrasting : in the lesser Magellanic Cloud stars one hundred times smaller , and more - 30 times less than in our spirals . In addition to these iii basic types occasionally found also so-called radio galaxies and Seyfert galaxies.