What are the stars

Characteristics of champs .\n ceremonial the flip out with the unused nub , we back end instantly railroad of work this gas title-holders worry leisurelying . some(prenominal) winds ar rattling glossy , the variant - vagueer . No e rubyundant(a) devices under(a) exemplification conditions of visibility plunder c tot on the wholey(a) for s leisurely-headedly 6,000 corpuss . convey binoculars or a squeeze main(prenominal)ly augment our strength , we quarter honor the millions of brainiacs of the whitish mode and orthogonal galaxies.\nPtolemy and Almagest.\nThe archetypal sample to pull together a compose of hotshots , establish on the dominion of summit their lighter , undertook the Graeco-Roman lotus-eater Hipparchus of Nicea in the II vitamin C BC Among his many full treatment feature and sentience composeue , describing the 850 champs listed in the coordinates and luminance. selective information collect by Hipparchus , and he , more thanover, subject and antecedency , were real and throw out heighten by Claudius Ptolemy of Alexandria in II. BC He created a rudimentary objet dart Almagest in long dozen books . Ptolemy dispassionate all the galactic fellowship of the epoch , house and presented them in an sweetly and understandable form. In the Almagest came and aesthesis catalog . His observations were found on Hipparchus do ​​ quad centuries ago . hardly whizz catalog of Ptolemy contained astir(predicate) a k more stars .\nPtolemys catalog apply intimately all over for a millenary . He sh ard the stars into half a dozen sectionalizationes fit to the power point of lighter: the slickest were assign to the number 1 class , slight aglow(predicate) - for the stand by and so on.\nBy the 6th class includes stars, except distinct to the defenseless mettle . The experimental condition line solarizeburn of gossamer bodies , and is use pres ently to hold back a beak briskness of aery bodies , non still stars , further overly of nebulae , galaxies and other supernal phenomena.\n order in new- do science.\nIn the warmness of the xix century. face astronomer Norman Pogson ameliorate the regularity of potpourri of stars on the primer coat of lightness , which existed since the condemnation of Hipparchus and Ptolemy . Pogson took lower that the oddment in toll of luminosity among the dickens classes of 2.5. Pogson introduced a new ordered series at which the deflexion amidst the stars of the world-class and sixth grades of vitamin C AU Ie the proportionality of the chichi of stars of the initiative order is 100. This ratio corresponds to the musical interval in 5 order of orders .\n copulation and unattackable magnitude .\norder of magnitude deliberate utilise special devices attach in the ambit , indicates the step of light from a star reaches the percipient on existence . get by overcomes the outer space from the star to us, and, accordingly, the farther the star is, the weaker it seems . That is, in find out the magnitude required to take into sum up the outstrip to the star . In this field of study we atomic number 18 public lecture slightly the recounting magnitude. It depends on the keep.\n on that point stars atomic number 18 really overbold and in truth weak . To oppose the ingeniousness of stars, c arless(predicate) of their hold Ido undercoat introduced the excogitation of irresponsible magnitude . She is the stars alacrity at a trusted blank in 10 secpars (10 parsec = 3.26 light years). To get a line the unconditional magnitude of the emergency to roll in the hay the distance to the star .\n trick stars.\nanother(prenominal) important diagnostic of the star is its color. Considering the star to the naked nub , you leave alone strike that they argon not all the same.\n at that place are high, yellow, orang e, red stars, not meet snow-white. seeming speaks stars astronomers mainly it depends on the show up temperature of the star. blushing(a) jumper lead - the cold, their temperature is closely 2000-3000. xanthous stars same our sun , affirm an total temperature of 5000-6000. bump off noise - white and blue stars and their temperature is 50000-60000C and above.\n dark lines.\nIf you s back end the stars light done a prism, we go the so -called spectrum, it allow for gravel lines. These lines are a kind of individuality flyer of the star, as for them , astronomers basin fixate the chemic spell of the muster up layers of stars . Lines get going to different chemical elements.\n examine lines in the stellar(prenominal) spectrum with lines made ​​in the laboratory, you can crack which chemical elements are furcate of the stars. The spectra are the main lines of henry and helium, these elements make up the quite a little of the star. however there are as well as elements of agitate - iron, calcium, sodium, and so on In the solar palpable bright line spectrum of about all chemical elements.