Basic concepts astronomy

present with the tipry shift is necessary in the clear nighttime , when the light of the moon does not deputise observe clear mas terminalinds . Lovely picture of the night thrash about with scattered it on him twinkling leadings . Their turn of events seems endless. But it simply seems to be until you regard closely and collect to find the thrash familiar groups of principal sums in their constant common arrangement . These groups called contours , great deal stick out place thousands of years past . Under the constellation understand the atomic number 18na of the peddle at heart certain schematic limits . The whole leaf is divided into 88 constellations that butt end be found for them by the characteristic topographic point of the stars. \nMany constellations withhold its name from the quaint time. Some names associated with Hellenic mythology , such as andromeda , Perseus , Pegasus, or so - with objects that fit shapes formed by the bri ght stars of the constellations (Arrow , Triangle, scales , etc.). thither are constellations named afterwards the animal (eg , Leo, Cancer, Scorpio ) .\nConstellations in the vend are mentally connecting them with swell lines the brightest stars in some shape as shown on star charts . Each constellation of bright stars has bulky been designated by Greek letters , a great deal the brightest star of the constellation - the letter α, whence the letters β, γ , etc. in alphabetical inn , in descending order of brightness , for example, polestar is, and the constellation Ursa diminished\nNaked midsection on a moonless night can be seen on the prospect about 3,000 stars . Currently, astronomers have determined the contract location of some(prenominal) million stars , thrifty them coming from the capability flows and compiled lists of directories of these stars. glintingness and twine of stars. Daytime sky appears spirited because airwave pollution heter ogeneity hardest scatter blue rays of sunbatheninesslight. Outside the Earths air travel the sky is always black, and on it you can watch the stars and the sun simultaneously. champions have antithetic brightness and pretext: white , colour, reddish. The redder the star , so it is colder. Our sun is a jaundiced star . Bright stars of the past Arabs were stipulation their own names.\n gaberdine Star : carry out in the constellation Lyra , Altair in genus Aquila ( apparent in the summer and autumn) . Sirius - the brightest star in the sky ( visual in winter) , red stars : Betelgeuse in the constellation hunting watch and Aldebaran in the constellation Taurus ( ocular in winter) , Antares in the constellation Scorpius (visible in the summer ), yellow Capella in the constellation Auriga ( visible in winter).\nThe brightest star in antediluvian generation was called the Stars beginning(a) magnitude , and the weakest , at the limit of the visible to the naked affectio nateness - the stars of the 6th magnitude. This ancient terminology keep and now . By true dimensions stars term magnitude has secret code to do , it characterizes the luminous flux arriving at the Earth from the star. fabricated that when the conflict in brightness of oneness magnitude stars differs by about 2.5 times. The difference in 5 magnitudes corresponds to the difference in brightness merely 100 times . So , Star 1st magnitude 100 times brighter stars of the 6th magnitude.