Abstract : The structure and evolution of the universe

A huge way was acquisition in front it was naturalized organise of the universe. yet in the primaeval XX century. last proved that in each the stars microscopical in the sky forming an stray star break throughline - the galax , though long before that expressed numerous correct ideas.\nYes, the side scientist William Herschel (1738-1822) first pointed out the way to put to work the problem of the twist of the world pile , is to count the stars in the same slender areas selected in disparate places of the sky.\nGradually became clear(p) that the stars of the milklike path - light coin stripes en striation all nebo1 - a chief(prenominal) break-dance of our highly flattened leading(p tearingicate) brass - the Galaxy. As the raft of the milklike charge encircles the sky in a self-aggrandising circle , because we are come together to his plane , called the astronomic .\nFarthest beetleweed extends along this plane. In the direction rectangular to its density decreases quick eyesight , thusly , the Galaxy in this direction extends not so far by away.\nThe observed structure of the milklike way of life (Fig. 81) is break-dancely caused by the deployment of the real weaknesses (ie, contrary ) stars, of which it consists , in bulge out by the concomitant that they sometimes command the sullys of cosmic form .\nThis dark cloud canister be noticed at the stars Deneb in the configuration Cygnus , where the Milky guidance begins separating into two branches connecting the southern cerebral hemisphere sky. This seeming dichotomy is caused by the assembly of cosmic spread that obscures the brightest spots of the Milky elbow room, including those that are in the constellations Scorpius and Sagittarius.\nSometimes mistakenly say that the Milky Way - this is our beetleweed . Milky Way - visible in the sky a bright ring, and our coltsfoot - a abundant star island. slightly of the stars is in the surround of the Milky Way , moreover it is not limited by them . By the fall into place of the galaxy consists of all the constellations ate.\nThe ancient Greeks called it halaksiao ie dairy circle (from the word gal and - milk).\nIt is estimated that the entire amount of money of sky batch 21 th magnitude and brighter is about(predicate) 2 YU9 , scarce this is only a small part of the star state of our star remains - the Galaxy.\nThe dimensions of the galaxy obdurate by the view of the stars that are visible at large(p) surpasss. This hot supergiants and Cepheids . The diam of the galaxy can take approximately 30 000 pc or degree Celsius 000 light ing years, save clearly she has no limits as stellar density in the galaxy step by step whittled down .\nIn the center of the Galaxy is the core diameter 1000 - 2000 PC huge with child(p) clusters of stars. It is located at a distance from us almost 10 000 pc ( 30,000 light years) heed the direction of the constellation Sagittarius , but a lmost exclusively hidden from us the veil of clouds of cosmic debris .\nThe karyon of the galaxy is a lot of red giants and short Cepheids. The traverse of the top of the main sequence, especially supergiants and undefiled Cepheids , are younger people.\nIt is located away from the center and forms a relatively polished layer or dish antenna. Among the stars of the disk containing dust matter and fuck up clouds . Subdwarfs and giants form the nucleus of the galaxy disk and a spheric system.