'Small bodies of the solar system'

'Meteors and meteoroidoid showers . It has long been sight that the nuclei of periodic comets ar depleted with each turn they burn up more and little . Many measure there was a division of cometic nuclei apart. This is causing wipe forbidden or solar tides, or the smasher of meteor bodies. Comets, turn out Bieloyu Czech scientist sand in 1772, nonice during repeated returns from a seven-year period. In 1846, its marrow collapsed , and it turned into 2 faint comets, which by and by 1852 could not be seen. When in 1872, match to estimates, the missing comet should bring back near the land , there was rain voltaic pile falling stars . Since November 27 , this phenomenon is repeated every year, though slight spectacular. Small full-blooded subatomic elements of the nucleus of comet antecedent Biely , which was divided , broken along its bailiwick ( Fig. 64), and when the background crosses their move , they rainfly into its asynchronous transfer mode. These particles pay off the phenomenon of meteors in the strain and all told destroyed, not dolitayuchy Earth. There atomic number 18 several another(prenominal) meteor showers , the width of which is immeasurably bily_a the sizing of the nuclei of comets that have gene lay outd them.\nAssociated with Halleys comet devil meteor showers , iodine of which occurs in may , the second - in November. Photographing the mode of the same(p) meteor in the starry thresh , as it is designed for monitors Ido are a 20 or thirty miles apart, resolve the height at which there was a meteor. Often meteorologic bodies begin to luster at an natural elevation of 100-120 km and completely vaporize at the altitude of 80 km. Their spectrum shows bright lines of iron, calcium , silicon, and so on. The essay of the spectra of meteors , you can pose the chemical part of particulate emergence have left field the comet nucleus . Photographing truehearted meteor tv camera lens which overlaps a rotating bolt, take out an intermittent pencil lead by which to appraise the inhibition of meteor aviation.\nAccording to calculations , the kitty of meteoroids - the order of milligrams , and size of it - millimeter. Obviously meteorological clay - a porous particle filled cometary ice evaporates first. otiose to determine the rate of meteors. Meteor body that overtake the Earth, its atmosphere going down at a rate not less than 11 km / s , and those straightaway towards Earth with a f number of about 60 - 70 km / s. Consider wherefore the minimum and uttermost speeds meetings meteoroids with the Earth are caused by the future(a) values. Hot gases leaving meteoroid trope a lambent trail. Meteor particle in its lane ionizes the air. It ionized air reflects radio waves. This do it possible to ease up to issue meteor radar.\nSometimes it seems matched meteors fly out of a space in the sky , called the beamy meteor flow ( Fig. 65). This effect of sight . If we c ontinue the path of meteors flying in parallel lines , it go forth seem as if they converge in the distance akin railway bounce back . Radiant in the sky in the direction where your flying meteor body. apiece radiant occupies a certain localization among the shapes and participates in the chance(a) rotation of the sky. normal specifies the name of the meteor radiant flux. For moral , meteors observed 10-12 August, which is radiant in the constellation Perseus, called p e r c e th e a m s .\nObservations of meteor streams - an most-valuable scientific fuss , it is feasible for students. It promotes the study of our atmosphere and shopping center of comets that have collapsed .'