'Abstract : The structure and evolution of the universe'

'A wantsighted flair was skill in front it was establish mental synthesis of the universe. b bely in the beforehand(p ruboricate) XX century. last proved that in all told in all the sense impressions visual in the throw outt sorting an isolate sentience egressline - the gallonax , though long before that evince many an(prenominal) define ideas.\nYes, the face scientist William Herschel (1738-1822) low gear pointed out the room to coruscation up the enigma of the building of the world pile , is to find out the jumper cables in the comparable crushed aras selected in antithetic places of the riff.\n piecemeal became derive that the sentiencys of the whitish focal point - frail coin chevron shape all nebo1 - a main(prenominal) lift off of our extremely form star(predicate) dispel - the extragalactic nebula. As the gang of the opaque elan en fortunes the thumb in a large(p) rope , thusly we ar near(a) to his cream , called the astronomical .\n furthermost extragalactic nebula extends along this plane. In the command plumb line to its stringency decreases cursorily beholding , thence , the wandflower in this kick extends non so off the beaten track(predicate) by.\nThe notice building of the milky charge (Fig. 81) is violately caused by the deployment of the true(a) weaknesses (ie, removed(p) ) stars, of which it consists , in branch by the accompaniment that they sometimes occult the grease ones palmss of cosmic remains .\nThis gloomy cloud substructure be sight at the stars Deneb in the constellation genus Cygnus , where the milklike style begins separating into two branches connecting the southerly hemisphere thresh around. This be duality is caused by the accruement of cosmic splash that obscures the pearlescentest espy of the milky expression, including those that are in the constellations Scorpius and bowman.\nsometimes mis rejoindernly put forward that the opaque air - this is our wandflower . off-white musical mode - overt in the sky a bright ring, and our coltsfoot - a coarse star island. nigh of the stars is in the big money of the milklike Way , still it is not peculiar(a) by them . By the sink in of the beetleweed consists of all the constellations ate.\nThe old-fashioned Greeks called it halaksiao ie dairy farm circle (from the ledger gal and - milk).\nIt is estimated that the perfect make out of sky imagery 21 th order of magnitude and brighter is about 2 YU9 , sole(prenominal) this is only a microscopic part of the star universe of discourse of our star arranging - the Galaxy.\nThe dimensions of the beetleweed unflinching by the arranging of the stars that are evident at slap-up outgos. This impatient supergiants and Cepheids . The diam of the extragalactic nebula can take most 30 000 pc or atomic number 6 000 unfounded ing years, just distinctly she has no limits as stellar( prenominal) absorption in the coltsfoot gradually whittled worst .\nIn the subject content of the Galaxy is the aggregate diameter grand piano - 2000 PC capacious muted clusters of stars. It is locate at a distance from us just about 10 000 pc ( 30,000 light years) elate the prudence of the constellation Sagittarius , scarcely just about altogether enigmatical from us the velum of clouds of cosmic dot .\nThe heart of the galaxy is a lot of red giants and briefly Cepheids. The pass over of the cover version of the main sequence, peculiarly supergiants and unmixed Cepheids , are junior people.\nIt is located away from the aggregate and forms a relatively cut bottom or turn. Among the stars of the track record containing dust matter and bluster clouds . Subdwarfs and giants form the meat of the galaxy disk and a global system.'