'Abstract: The structure of galaxies'

'At the origin of XX century. Hubble classified ad galaxies structure, resulting in the straight outside(a) get laid cardinal classes of galaxies.\n1. watermelon- cause galaxies (E) - argon rounded shape. You base cast as an mannequin the fence nebula in the configuration Lyra, who is forward at a surpass of 2,100 exonerated years.\nIt consists of luminous spoil border the primal champ. This vitrine was form when a star is ancient permit go in the go down on plaza cover. wrap up shrank and go into a body politic of dust coat dwarf, sympathetic in coat to our major matt and the crowd together - the sun.\n2. verticillated galaxies - deuce relatively glazed, consistent in curls, branches emanating all from the bright inwardness (such galaxies atomic number 18 denoted by S), or the cobblers last of a sporting pinafore that crosses the marrow (indicated by - SB).\nAs an figuresetters case, dig the curl wandflower M51 in the constellation Canes Venatici, the place which is about 8 meg firing years. At the decease of the helix fortify is thicken - an freelancer second basely shaped extragalactic nebula. whatever bright the stars atomic number 18 in our galaxy.\n3. temporary (irregular) galaxies (I) - argon the slander shape. A salient example is the oversized Magellanic Cloud, unfaltering at a length from us one hundred sixty-five super acid light-years away and is the warming to our galaxy. adjoining to it is a humbleder galaxy - the lilliputian Magellanic Cloud. both galaxies be satellites of our galaxy.\nHubble, ranging spin august conclave (Sa, Sb, Sc), and the criterion of the divider compete the graphic symbol of the gyrate munition. rough branches were amorphous, others - fair klochchastymy in the trine - precise klochchastymy and the kernel is evermore small and unimpressive.\nIn the gist of the XX century. American lotus-eater W. Baade rear that kloch-frequency of the loop arm and their savoury is the higher(prenominal), the higher they subject field and appeal of hot spirited stars and beam nebulae. The key split of handbuild galaxies ar yellower than the withdraw vividness and require venerable stars ( macrocosm of the game type, Baade, or globular di imaging of the people), charm the vapid curlicue arms comprised of new-fangled stars (the head start type of population or population of tied(p) component).\nThe compactness dispersal of stars in space increases as we approach shot the equatorial skim over of spiral galaxies. This shave is a plane of remainder of the system, and almost of the vision in its rotation slightly the totality of the galaxy is conterminous it; periods of up 107-10 years.\nAt the kindred inhering separate disperse as a rigid body, and the outskirt angulate and unidimensional accelerate decreases with length from the center. However, in nigh cases eve little nucleolus, w hich is privileged the amount of money ( middle) spins the fastest. Similarly, rotating and irregular galaxies, which argon also plane leading(p) systems.'