Small bodies of the solar system

Meteoroid down(p) size some clocks completely evaporates in the atmosphere . near of its mass during f lighthearted of st fashions is greatly minify and the worldly concern reaches just now remains , which ordinarily have time to cool grasscelled when the space amphetamine quench air resistance. sometimes change surface a meteor rain give way . During the flight, meteorites and obplavlyayutsya covered swart crust . unrivaled such nasty pit in Mecca vmurovanyy in the argue of the house is the qualified of worship. There argon three types of meteorites : st iodin , cast-iron (fig. 59) and iron-stone . somewhattimes finding meteorites rangy after their surrender . Especially a lot of iron meteorites give . The messold age of radioactive elements get and determine the age of meteorites. It is different, and the oldest meteorites have an age of 4.5 billion days.\nSome precise large meteorites falling at high facilitate burst and family a volcanic crater that resemble the moon. The largest of the craters is detect in genus Arizona in the joined States (Figure 60). Its diameter of 1200 m and 200 m deep crater appe ard This , obviously, approximately 5000 years ago. We gear up traces of hitherto greater and to a greater extent ancient meteorite craters . all meteorites - are members of the solar clay. As observed many depleted asteroids that particular the plain of Mars , we can speculate that the meteorites - it fragments of asteroids with stadiums that cross footings playing field . The twist of some meteorites suggests that they regard the high temperature and push , therefore, meteorites can be destroyed in the bowels of the planet or large asteroid. As part of the meteorites bring significantly few minerals than in terrestrial rocks. This indicates a patriarchal character meteorite substantial . However, many of the minerals that coerce up the meteorites are not found on Earth. For example, virtually stony meteorites sway rounded grains - chondrules , the chemic composition of which is virtually the same as that of the Sun. This ancient piece provides in dustation about the initial branch of the make-up of planets.\n3. Comets , their baring and motion. Being in space far from the Sun, the comet should look in truth weak, blurry , quick-witted spots in the center of the meat . Are very bright and form only a comet get behinds that are relatively culture to the Sun. The appearance of the comet from the Earth depends from the blank space to it, the angular distance from the Sun, the light of the moon and so on. Great Comets - woolly pale formation of long tail - considered the forerunners of all sorts of troubles, wars and so on.\nNewton basic calculated the orbit of a comet by watching it move against the background stars, and found that it , like the planets in the solar system move beneath the influence of sobriety of the Sun. His contemporary , the side scientist E. Gal chaplet (1656-1742) , by conniving the orbits of several comets suggested that in 1531 , 1607 and 1682 was observed one and the same comet that sporadically returns to the Sun, and was first predicted its event . In 1758, as predicted Halley ( 16 years after his death) , it rattling was and was called comet Gal lei. At aphelion it is beyond the orbit of Neptune ( fig. 61) and in 75-76 years, returns to the Earth and the Sun. In 1986, Halleys Comet passed in as the shortest distance from the Sun. At the run into it was first send automatic interplanetary station with scientific equipment .