On the night of August 12 of one thousand falling stars will pierce a firmament! (If you dream of something, formulate desire in advance).
With 17-го on August 24 inhabitants of a planet Earth have opportunity to observe plentiful "windfall". This phenomenon has the beautiful name - Perseida's meteoric flow (speaking to language of science, the stream radiant during a maximum is in Persey's constellation).
The maximum peak of the phenomenon falls on August 12. According to forecasts of scientists, tracing of number of flashes from 70-ти to 1-oh thousands within an hour is expected, the newspaper on - Odessa" reports ". Everything depends on weather conditions, and also on influence of a full moon which drops out for August 17.
Nikolayevtsa also will be able to observe this fantastically beautiful phenomenon.
- "The meteoric rain" can already be seen since sunset. That it was more available to a review, it is desirable to look at it from height (for example, from a roof of the multi-storey building). It will be for this purpose necessary to become to the north and to look over the horizon, - the Nikolaev astronomer Olga Sergiyenko tells. - "The meteoric rain" will move on "route": the North - North - the East - the East. In a zenith it will be at daybreak - in five - six hours. In order that it is better to make out it at this time, it will be necessary to become facing the South.
Perseida's meteoric flow annually appears from Persey's constellation. It is formed as a result of Earth passing through a tail of a comet of Swift - Tuttlya. The smallest particles, of the size of a grain of sand, burn down in the terrestrial atmosphere, forming "windfall".
According to the employee of the Nikolaev astronomical observatory of Kalinenkov Olga Sergiyenko, so-called "windfall" is formed owing to an attraction of planets.
- Along a cometary orbit splinters fly, - Olga Sergiyenko reports. - Where they are crossed with Earth orbit (that is when Earth crosses an orbit of this comet), these oskolochka enter the atmosphere of Earth. They are stretched along all orbit of the former comet.
To observe meteors, optical tools aren't necessary. Too narrow visual coverage is better to observe meteoric streams exactly with the naked eye, as from telescopes.Such supervision, according to a site "Astrogalaktika", can bring essential benefit of astronomy for an assessment of activity of meteoric streams at Earth occurrence through "cloud" of the meteoric particles which orbit crosses a terrestrial orbit.
The meteoric body is a piece of a stone or a dust congestion in a space. The surface of Earth "is constantly bombarded" by celestial bodies of the most different sizes. At friction about the atmosphere of a particle are warmed and burn down or evaporate, reserving a bright trace - a meteor. The light phenomenon arising at the height from 80-ти to 130-ти of kilometers from a surface of Earth at invasion into the terrestrial atmosphere of particles - meteoric ph. is called as a meteor. Speeds of movement of meteoric bodies are various - from 11 to 75 km/s.
The radiant gains height during the whole night. At most 12-го August it will be best of all visible from east and North - east Asia, including Japan though than later there will be a real peak, especially the western territories get to a favorable zone for supervision. The peak 13-го has to be visible August from the extremely western areas of Europe and about east coast of North America, and also from northern parts of South America and northern Atlantic.
The only lack of a stream is its inaccessibility from the majority of areas of the southern hemisphere.
Meteors from a stream Perseid white and sharply draw the sky as the speed of meteors Perseid makes 61 km/s of a stream. Radiant coordinates in the period of a maximum are equal an alpha of 45 degrees, the delta + 57 degrees. The radiant of a stream is displaced over time.
The radiant is in the northern hemisphere of Earth at sufficient height, practically, all night long therefore to observe a stream it is possible from evening to morning.