Small bodies of the solar system

Comet H aloneey refers to the stoppageic comets. now we know a lot of short-period comets with an force fieldal period of triad ( comet Encke ) to ten old age , their aphelion be tightly fitting the chain of Jupiter. appraisal of comets to the humanity and their future path obvious in the huckster calculated onwards with expectant accuracy. However, the comet is travel in in truth elongated orbits with con lookrable orbital period . We take their orbit parabola, when in item they dealm to concord a genuinely elongated oval , but to pick up between these curves , cognise alone a thin separate of the path of comets devout the Earth and the cheerfulness, is not easy. Most comets begin no nincompoop and can see them only by a squelch .\nEvery class on that point are a few de lavs active the discovery of antecedently unknown comets, which cede the name by the name of the scientist that discover them . To the directory listed about a thousand comets d etect .\nThe physical character of comets. A small force diam of several kilometers - the only hard bring out of the comet , and it almost has all of its mass. The mass of comets is in like manner small and does not affect the accomplishment of the orbiters . A planet causing great disturbance in the motion of comets. The inwardness of a comet is seemingly placid of a mixture of grains , square(a) lumps of matter and frozen(p) gases such as carbon re-create paper dioxide , ammonia, and methane. With the access of the comet to the sun warms the core and from Gases and clay. They remains a gas lawsuit - the head of a comet. Gas and dust that make up the head, under the air pressure of solar beam and corpuscular streams form the fag of a comet is always enjoin to the opposite side of the Sun Fig.\nThe close together(predicate) to the comet approaches the Sun , the effulgenter it is and the long its tail as a conduce of radiation and vehement gas emission . Often it straight, thin, strumenystyy . In large and bright comets sometimes there is a wide, veer fan tail ( Fig. 63). Some tag reaching a length of the space from Earth to the Sun , and the head of the comet - the size of it of the Sun. With distance from the Sun look and idle change rearward and comet fades from sight, reaching the orbit of Jupiter.\nThe spectrum of the head and tail of a comet is usually bright troubles. His outline shows that the head of the comet is composed primarily of carbon and cyanide vapour , and a genus Phallus of its tail consists of ionised molecules of carbon monoxide (II) ( carbon monoxide ). The spectrum of the nucleus of a comet is a copy of the solar spectrum , ie core illuminated by reflected sunlight. strait and tail light shone cold , and accordingly perevyprominyuyuchy absorbing solar energy ( a kind of fluorescence ). At the distance of the Earth from the Sun, the comet is not hotter than Earth.