The world of the unknown - Onua.org

Meteors, or "falling stars" is the light phenomena in the Earth's atmosphere caused by the invasion of small solid particles with a speed of 15 to 80 km/sec.

Meteor shower - many meteors, which seem to be emanating from a single point in the sky and observed for a limited period (usually a few hours or days). Meteor showers occur when Earth in its orbital motion crosses meteor swarm (extended accumulation of meteoric matter in orbit around the Sun).

For the year to the surface of the Earth is falling not less than thousands of meteorites, but scientists are few. Almost all of them found by chance. There are three main class of meteorites. Iron are solid pieces of iron-Nickel alloy. Zhelezorudnye remind metal sponge, filled with silicate material. On Earth these rocks do not occur. Stone meteorites to know more difficult. Securely to do it at the company. However, the simplest features of meteorites can be specified.

Meteors are falling down suddenly, at any time and in any place of the globe. Their decline is always accompanied by a very strong light and sound effects. Across the sky at this time, in seconds passes very large and bright bolide. If a meteor falls in the afternoon at the cloudless sky and bright sun light, the car is not always visible. However, after his flight in the sky still like the smoke Curling trail, and the place of disappearance car appears dark cloud.

Astronomical discoveries of recent times have shown the presence in space is not available devices of energy, which controls the course of development of the Universe. About it declared today the Director of the main astronomical Observatory of Ukraine, member of Ukrainian Academy of Sciences and many foreign academies Yaroslav Yatskiv.

A small nucleus of a comet is its only hard part, it focuses almost all her weight. Therefore, the core of the first cause of all the rest of the complex comet phenomena. The nucleus of the comet is still not yet available telescopic observations, as they variruyutsya the luminous matter, continuously flowing from the nuclei. Using large increase, you can look into the deeper layers of luminous gas-dust shell, but what's left of its size, is still significantly exceed the real size of the kernel.

The project "VEGA" ("Venera - Halley's comet") was one of the most difficult in the history of space research. It consisted of three parts: the study of the atmosphere and surface of Venus using boarding devices, the study of the dynamics of the atmosphere of Venus using balloon probes, migration through whom and plasma membrane of Halley's comet.

Where did come to us "tailed stars"? Still on the sources of comets are lively discussions, but a single solution has not been developed.

In February and March 1744 in the scientific circles of Petersburg Academy of Sciences there was great agitation. These days in the sky was observed wonderful bright comet with a huge tail. With special interest was watching the comet, for her moving among the stars, and changing the appearance of the then young scientist M. Century Lomonosov.

Halley's comet - In 1705 Edmond Halley, using Newton's laws of motion, predicted that the comet, which was observed in 1531, 1607 and 1682 years, should return in 1758 (which, alas, was after his death). Comet really returned, as was predicted, and was later named in his honor.

The problem comet hazard analyzed in detail in numerous publications. It should be noted that the greatest danger is a massive long-period comets, their appearance is often unexpected, because of arbitrary orientation of the planes of the orbits and large or very large orbital period. Moreover, many of these comets is aperiodic, i.e move in non-closed trajectories (parabolic or hyperbolic) and therefore are really new. These comets possible over a high speed collision with the Ground - up to 72 km/s (on a collision trajectory)that could lead to a global disaster. The possibility of such catastrophic events is proved by many facts.

In the Solar system besides the large and small planets there are other heavenly bodies. First of all, it comets, which is also called the caudate stars. Is small, the size of several kilometers, blocks of stone and ice. According to the laws of Kepler's comet, like the other bodies of the Solar system, moving in elliptic orbits. But their orbits are very stretched, so that the most remote from the Sun point is usually far beyond the orbits of the most distant planet Pluto.

About seven thousand years ago in a remote corner of outer space suddenly exploded star, throwing off the outer layers of matter. Relatively large and massive star is suddenly faced with a serious energy problem - its physical integrity was under threat. When was passed stability boundary, broke into a fascinating, highly powerful, one of the most disastrous in the Universe explosions that produced a supernova. Six thousand years raced on the expanses of space light from this star in the constellation of Taurus and finally reached the Earth.

Space is often called the airless space, believing it empty. However, it is not. In interstellar space is dust and gas (mostly helium and hydrogen, the latter much more). In the Universe there are whole cloud of dust and gas. These clouds we do not see the center of our Galaxy. Of these clouds can have dimensions in hundreds of light years, and part of them can be compressed under the influence of gravitational forces.

In the 60-ies of XX century by accident when monitoring radio telescope, which was designed to explore flickers of cosmic radio sources, Jocelyn bell, Antony hewish and other employees of the University of Cambridge in the UK found a series of periodic pulses with a duration of 0.3 seconds at a frequency of 81.5 MHz, which was repeated surprisingly constant time, through 1,3373011 seconds. It was very unlike the usual chaotic random picture occasional flickers. There was even an assumption about extraterrestrials, who at the Land of their signals.