Total lunar eclipse will occur on 12/10/2011
Up 10/12/2011 in Vietnam will have the opportunity to admire the interesting phenomena of the universe: the total lunar eclipse. If you like the first time eclipse occurs at midnight until dawn the next time this happens just at dark sky. This time, right time peak, the moon will turn into a red bottom.
At 19g45 ' the moon will begin to enter the dark areas of the earth and gradually through a period of partial eclipse . By 21g06 ' is the beginning of a full lunar eclipse and reached maximum at 21g32 ' ie at full moon turns red. Then the partial lunar eclipse will continue to until it ends at 23g18 ' (According to the HAAC - Note: There are many sources of forecast and there is a difference more or less on time ).
According to the Astronomy Club Amateur City, this is the longest lunar eclipse 21st century.
We can see with the naked eye or binoculars types. (Of course, if feasible, viewing by telescope is much more interesting).
Let's try to learn the cause of this phenomenon:
Interpretation of the lunar eclipse:
When the sun, the earth, the moon is on the same line (between the Earth), the moon lies in the shadow of the earth, it was not more sun illumination. All these localities are at night the moon will not see in normal light. Meanwhile, the lunar eclipse occurs.
Earth and the sun shines is the light barrier from the sun creates a shadow zone extends in space. Lunar eclipse occurs when the moon enters the shadow of this. When the moon was no longer in direct sun light.
Position between earth and moon the sun why the day of the lunar eclipse is always a full moon, when looked at from the earth, moon phase is the maximum circle. On the full moon, the moon is very bright and yellow. However, when the lunar eclipse occurs, we see the moon as a dark red circular disc.
Why do we not often observe the lunar eclipse?
Plane Earth travels around the sun called the plane "Zodiac," and the plane of the moon moving around the earth plane called "white lead". Zodiac and transparent direction an angle difference of about 5 degrees to the lunar eclipse took place at.
Orbital plane of the moon remains in space, lunar eclipses only occur when the tangent straight line connecting the center identical to the sun - the earth. On prospectus directed only two positions correspond to this condition. When opposition to the moon if more than 5 points will have the full lunar eclipse . If the moon the more points from 5 to 11 degrees will have a lunar eclipse or partial eclipse .
Eclipse is the result of relative motion between the three celestial bodies are the earth, sun and moon. Cycle and the nature of the three celestial bodies moving on well known, we can calculate the exact cycle occurs and predict eclipses matched next. This cycle called Saros cycle : 6585.32 days. In each cycle there will be 29 times Saros eclipse. Each calendar year a maximum of 3 times or 2 times, or not have eclipse.
Why lunar eclipse occurs when the moon is usually dark red?
Light from the sun are all components including color (in which the wavelength is divided into 7 main colors: red, orange, yellow, green, blue, indigo, violet). When sunlight passes through the Earth's atmosphere will absorb the atmosphere, only the red wavelength is the wavelength of light capable of penetrating the most traveled. At the same time the earth's atmosphere is a massive focusing lens makes the red light tends to pass through the optical axis deviation and this light illuminating the moon. Thus we see the moon is dark red.
Guide observed:
Upon the occurrence of eclipses, both half the world lies in darkness will be observed. We absolutely can observe with the naked eye without any eye protection equipment. But will observe eclipses more exciting when using binoculars or small telescope to clearly see the red surface of the moon.
@ Word BBT: The lunar eclipse is often called folk literally "eat white bear." Have you taken any good pictures or shoot video to share BBT posted for everyone to enjoy Nhe!
And while waiting for the time of the first two lunar eclipses this year, invite you to temporarily content with watching clips of astronomical phenomena in the month 12/2011 is as follows:
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