Одним из красивейших оптических явл

Одним из красивейших оптических явлений природы является полярное сияние. В большинстве случаев полярные сияния имеют зеленый или сине-зеленый оттенок с изредка появляющимися пятнами или каймой розового, или красного цвета. Полярные сияния наблюдают в двух основных формах – в виде лент и в виде облакоподобных пятен. Когда сияние интенсивно, оно приобретает форму лент. Теряя интенсивность, оно превращается в пятна. Однако многие ленты исчезают, не успев разбиться на пятна. Ленты как бы висят в темном пространстве неба, напоминая гигантский занавес или драпировку, протянувшуюся обычно с востока на запад на тысячи километров. Высота этого занавеса составляет несколько сотен километров, толщина не превышает нескольких сотен метров, причем так нежен и прозрачен, что сквозь него видны звезды. Нижний край занавеса довольно резко и отчетливо очерчен и часто подкрашен в красный или розоватый цвет, напоминающий кайму занавеса, верхний – постепенно теряется в высоте и это создает особенно эффектное впечатление глубины пространства.
Различают четыре типа полярных сияний:
Однородная дуга – светящаяся полоса имеет наиболее простую, спокойную форму. Она более ярка снизу и постепенно исчезает кверху на фоне свечения неба ;
Лучистая дуга – лента становится несколько более активной и подвижной, она образует мелкие складки и струйки;
Лучистая полоса – с ростом активности более крупные складки накладываются на мелкие;
При повышении активности складки или петли расширяются до огромных размеров, нижний краленты ярко сияет розовым свечением. Когда активность спадает, складки исчезают и лента возвращается к однородной форме. Это наводит на мысль, что однородная структура является основной формой полярного сияния, а складки связаны с возрастанием активности.

Часто возникают сияния иного вида. Они захватывают весь полярный район и оказываются очень интенсивными. Происходят они во время увеличения солнечной активности. Эти сияния представляются в виде беловато-зеленой шапки. Такие сияния называют шквалами. По яркости сияния разделяют на четыре класса, отличающиеся друг от друга на один порядок (то есть в 10 раз). К первому классу относятся сияния, еле заметные и приблизительно равные по яркости Млечному Пути, сияние же четвертого класса освещают Землю так ярко, как полная Луна. Надо отметить, что возникшее сияние распространяется на запад со скоростью 1 км/сек. Верхние слои атмосферы в области вспышек сияний разогреваются и устремляются вверх, что сказалось на усиленном торможении искусственных спутников Земли, проходящих эти зоны.

Результаты (английский) 1:

One of the most beautiful optical phenomena of nature is Aurora. In most instances, auroras have green or blue-green hue with occasionally emerging spots or border of pink or red. Aurora watching in two main forms-in the form of tapes and as oblakopodobnyh stains. When the lights intensely, it takes the form of tapes. Losing intensity, it turns into smudges. However, many tapes disappear, failing to get into spots. Tape how would hang in a dark space of the sky, recalling a giant curtain or drapery, stretching generally from East to West for thousands of kilometers. The height of the curtain is a few hundred kilometers, the thickness does not exceed several hundred meters, so delicate and transparent, that the stars are visible through it. The bottom edge of the curtain are quite sharp and clearly defined and often podkrašen in red or pinkish colour, reminiscent of a border curtain top-gradually lost in height and it creates a particularly striking impression of depth space.There are four types of Aurora:Homogeneous arc-lighting strip is the most simple, calm form. She is more comfortable on the bottom and gradually disappears up amid the glow of the sky;Radiant arc-tape becomes somewhat more active and mobile, it forms small folds and streams;Radiant Strip with an increase in activity of larger folds are small;With increasing activity, folds or loops are expanded to huge sizes, lower kralenty vibrantly pink glow. When activity subsides, creases disappear and the tape is returned to a homogeneous form. This suggests that a homogeneous structure is the main form of Aurora, and folds associated with increased activity.There are often other kind of radiance. They capture the entire polar area and are very intense. They occur during increasing solar activity. These lights appear as a whitish-green caps. Such lights are called hail storms. Brightest lights are divided into four different class apart on one order (i.e. 10 times). The first class included lights, hardly appreciable and approximately equal to the brightness of the milky way, shining the same fourth grade cover Ground as bright as the full moon. It should be noted that caused the glow spreads westward with a speed of 1 km/s. The upper layers of the atmosphere in the region warmed up and rush lights flashes up, affecting the enhanced the inhibition of artificial Earth satellites that pass these zones.

Результаты (английский) 2:

One of the most beautiful optical phenomena of nature is the aurora. In most cases, aurorae are green or blue-green hue with occasional specks or border pink or red. Auroras are observed in two main forms - in the form of tapes and a cloud-like spots. When the glow intensely, it takes the form of ribbons. Losing intensity, it becomes a spot. However, many tape disappear, unable to break into spots. Tapes as if hanging in the dark space of the sky, resembling a giant curtain or drapery, usually stretching from east to west for thousands of kilometers. The height of the curtain is several hundred kilometers, the thickness does not exceed a few hundred meters, and so gentle and transparent, it can be seen that through the stars. The lower edge of the curtain rather sharply and clearly delineated and often touched up in red or pinkish color, reminiscent of fringe curtain, the top - is gradually lost in height and it creates a particularly spectacular impression of depth of space.
There are four types of auroras:
Smooth arc - luminous band has the most simple , calm form. It is a bright bottom and fades up on a background of sky glow,
radiant arc - tape becomes somewhat more active and mobile, it forms small folds and streams;
Radiant strip - with an increase in the activity of larger folds superimposed on fine;
An increase in the activity of the fold or loop expanded to an enormous size, the lower kralenty shining bright pink glow. When activity decreases, wrinkles disappear and the band returns to a homogeneous form. This suggests that a homogeneous structure is the main form of aurora, and folds associated with an increase in activity. Often there are different kinds of radiance. They capture all the polar regions and are very intense. They occur during the increase in solar activity. These auroras are presented in the form of a whitish-green cap. These auroras are called squalls. Brightness radiance divided into four classes, which differ from each other by one order of magnitude (ie a factor of 10). The first class includes lights, faint and roughly equal in brightness of the Milky Way, the fourth-grade lights illuminate the ground as bright as the full Moon. It should be noted that arose glow extends to the west at a speed of 1 km / sec. The upper layers of the atmosphere in the heated outbursts of auroras and move up, which affected the strong deceleration of satellites passing these areas.

Результаты (английский) 3:

one of the most beautiful optical phenomena of nature is aurora. in most cases, the lights are green or bluish green hue with occasionally emerging spots or stripes.or red color. aurora watching in two main forms: in the form of films in the form of облакоподобных spots. when the light intensity, it takes the form of tapes. losing intensity, it turns into a blur.however, many bands disappear before he could break up into spots. the tape like hanging in the dark of the sky, recalling a curtain or драпировку, протянувшуюся generally from east to west for thousands of kilometers.the height of the curtain is several hundred kilometers, the thickness is not more than a few hundred meters, so tender and crisp, through it i can see the stars.the lower edge of the curtain is sharply and clearly outline and often подкрашен in red or cynanchica color reminiscent of кайму curtainthe upper is gradually lost in the altitude and this creates a particularly striking impression of space. there are four types of polar сияний:
homogeneous arc is glowing streak is the most simplea form. she was more intense at the bottom and gradually disappears in the sky background light;
radiata arc is the ribbon becomes more active and mobile, it forms small folds and trickle.