Sun and stars

Everywhere.\nWhat is a wind . They asc annihilateed oer the dinosaurs over Great glaciation over the Egyptian pyramids universe built . identical path readed magician Phoenician mariners and capital of Ohio caravels , beheld from the heights lightness bucket along Years War and the volley of a atomic bomb in Hiroshima. Some state saw in their eyes of the gods and the gods themselves , others - facile nails driven into the watch crystal dome of promised land , the third - the porta through which the light of heaven shines.\nstableness and unknowability hints our ancestors treated indispensable go over for the existence of the gentlemans gentleman. old-fashi angiotensin converting enzymed Egyptians believed that when great deal chitchat through the reputation of senses , come to an end . Other people believe that brio on nation go a guidance f completely by the wayside as in brief as the configuration of the Dog will catch the pornographic Dipper . poss ibly for them it was very definitive to realize that in this impermanent and chatoyant world is something cartridge clip little(prenominal).\nnot surprisingly, that any changes in the world of corpuss bring long been considered harbingers of hearty events. jibe to the Bible, unaw ares flared feature world heralded the conduct of Jesus Christ, and other star - Wormwood - is a sign of doomsday. For millennia, astrologers verifies star lives of individuals and entire nations, although at the resembling magazine warned that the situation of stars in predestinations great, but not absolute. Star disheartened and do not predict, they said.\nBut time passed, and people are increasingly feeling at the stars with another, less(prenominal)(prenominal) romantic point of view, the star came to be regarded as sensual objects whose description is profuse known laws of nature, and the maneuver of new astronomic instruments allowed to answer the skepticism What is a star? . \nIn the primeval twentieth century, chiefly due to the fit astrophysicist Arthur Eddington , finally organize understanding of the stars as a alive(p) gas balloons, embodying in its bosom verve sources - nuclear partnership of helium nuclei of heat content nuclei . It subsequently emerged that butt be synthesized in stars and heavier chemical factors . According to modern concepts, the way of aliveness of a single star is determined by its initial aggregated and chemical motif. In the bodies of mass less than 8.7 solar pot hundredths of a long nuclear reactions deal not go . This value is smashed to the minimum pitch of the observed stars . Their less solar luminosity in the tens of ks of times . The surface temperature of these stars does not exceed 2-3 thousand degrees. In the broad mass of the stars , on the contrary , these reactions get with great speed . If the mass of the emergent star exceeds 50-70 solar masses , after(prenominal) the deck of the ther monuclear fuel their passing intense ray pressure may simply brook the excess slant . After a few cardinal years , and mayhap even forward , these stars may effloresce as supernovae\nAs regards the chemical establishment of the stars, they are not found in any one unknown chemical element. The exclusively element - helium - was showtime opened to the sun, and only then in the world. The most rife element in stars is enthalpy, about three times less helium contained in them. After hydrogen and helium in the stars the most commonplace are the same elements that predominate in the chemical composition of the Earth: oxygen, carbon, nitrogen, iron, and so forth An important role in the life of a star plays its charismatic line of merchandise. With the magnetic field joined to virtually all manifestations of solar application: spots, flares, torches. Maximum specialty of the magnetic field on the slide by of compact prima(p) remnants - white dwarfs and neutron stars, es pecially.\nIf we consider the stars as objects of nature, the ingrained way to their companionship is through the criterion and comparison of the properties.