Wednesday, June 22, 2011

Milky Way

All the visible vault of heaven is surrounded by the Milky Way, which can be compared with the glowing white ribbon. Naked eye, it seems equally bright, but with a telescope can be seen in many parts of its countless small and tightly clustered stars. As for the rest of the sky, the vast majority of visible stars there and almost all the bright luminous body found near the Milky Way, the most well away from his side of the firmament poor stars. To explain this phenomenon admit that our planetary system represents one of the many parts of the big heap of stars that is shaped like a flat lens (lentil). If we look towards the more remote from us sharp edge of the lens, you notice a myriad of stars we call them the Milky Way, on the contrary, far from the last space will seem to us poor stars, as in this case, we direct the eye to the flat faces lens and see before him only a thin layer of stars. According to some estimates - of course, very rough - it can be assumed that the least remote part of the lens edge is from us by 79 the distance of Sirius, and the furthest at 497 (the distance of Sirius is 20 billions of miles). It is known that the sun do not preserve their position, but it has a forward motion, the latter, we do not notice, because the Earth as well as all the planets, taking part in it. Only careful observation subtle movements of the fixed stars enable us to establish this fact, it turns out that we rush to the constellation Hercules at a rate that fluctuates between 23 / 4, and 7 miles per second. In recent years, for small deviations of the known color spectrum lines attempt to determine the speed with which we are approaching or moving away from us some of the stars, but it goes without saying that even under the most favorable conditions in this way can be found the sum of velocities of the Sun and the observed stars; The speed of movement of the Sun itself remains unknown. Like the Sun and other stars are moving. We do not make a mistake, admitting that their movement is subject to the same mechanical laws which govern the motion of planets around the Sun. Do the sun and the stars straight motion, they form a well-known system, moving the curves around their common center of gravity, they all revolve around some central sun, whether to finally seek the sun in one of the Pleiades constellation Taurus, as was once suggested - all these are questions for which we have no data. Earth - one of the smaller planets in the solar system, and our sun itself in several millions of stars similar to it is not, apparently, a prominent place. Insignificant speck of dust seems the planet on which we live and which affect all the vital interests of mankind. Finally, and that stellar bunch, in which the land - only the atom does not represent the universe: probably it is one of the many systems of higher order, are, perhaps, in the same relation to each other as individual stars. Among the shining stars in many places, the sky being seen countless bright spots, and partly they are visible to the naked eye, in most cases only with the help of astronomical pipes it - so-called nebulae. Watching such stains through strong telescopes were able to prove that they consist of a huge number of tiny stars that are closely crowded together in one place, it is likely that the nebula - the same independent of the system and, perhaps as big as the Milky Way with all its stars and our sun (Kant). There are disclosed to us is infinitely great prospects, and we can not conceive of these incomparably greater extent.

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