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LUNAR ECLIPSE

LUNAR ECLIPSE . BY: GLENN. Definition . Lunar eclipse

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LUNAR ECLIPSE

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  1. LUNAR ECLIPSE BY: GLENN

  2. Definition • Lunar eclipse • Lunar eclipse is one of the natural phenomena. It happens when the moon passes through the shadow of the earth. A lunar eclipse can last up to an hour and a half. During a lunar eclipse the moon may turn a reddish color. It is not dangerous at all to look at a lunar eclipse because the moon does not make its own light. It can only been seen in some countries around the world and there is seven steps. • Penumbra • The Earth has two shadows, one inside the other. The inner shadow is called the umbra, and it's the darker shadow. The penumbra is a wider shadow, stretching out more to the sides, but it's not as dark as the umbra and you can see the moon in a reddish color. • Umbra • Umbra is the inner core of the earth’s shadow and it is covering the moon and you cannot see it because it is covered by the earth and it is more difficult to see then when it happen in the penumbra .

  3. Type of eclipse • There are two types of lunar eclipse umbra and penumbra. Umbra is harder to see and rarely can be seen in the dark while penumbra can be seen because of the reflect of the sun to the moon and that make a reddish color and it is not dangerous like the solar eclipse.

  4. How it happen • How it happens • A lunar eclipse happens when the Moon passes directly behind the Earth into its umbra (shadow). This can happen only when the Sun, Earth, and Moon are aligned exactly or very closely with the Earth in the middle. A lunar eclipse can only happen in the night of a full moon.

  5. 12 steps • 1. The moon enters the penumbra – at 12:29 am EST/9:29 pm PST • The shadow of the Earth has two parts: the umbra – the darker inner part, and the penumbra – the lighter outer portion surrounding its shadow. • Only forty-five minutes after the beginning of the eclipse, sky watchers will be able to see something happening to the moon, since the penumbral shadow of the Earth is so faint that it stays invisible until it reaches over 70% of the moon's disk.

  6. 2. The penumbral shadow starts appearing (1:13 am EST/10:13 pm PST) • Since the moon is far enough into the penumbra, you should be able to see it on its disk, so begin searching for a faint light shading on its upper left side, that will only become more obvious as time passes. • The shading will look like it's spreading and deepening, and just before entering the Earth's dark umbra shadow the penumbra should appear like a spot on the moon's left portion.

  7. 3. Moon enters umbra (1:33 am EST/10:33 pm PST) • Now, the moon starts to cross into the Earth's umbra, and a small dark shape appears on its upper left-hand (northeastern) limb • This is the beginning of the partial phase of the eclipse, and the umbra becomes much darker than the penumbra and rather sharp-edged. • The shadow will start covering the moon, and even if at first the moon's limb seems to disappear inside of the umbra, as it moves in deeper later on, you should see it becoming orange, red or brown.

  8. 4. 75% coverage (2:23 am EST/11:23 pm PST) • With only a quarter of the moon to go, the part covered by the shadow should start to slowly light up, usually in shades of red and gray, but also brown, blue and other tints sometimes.

  9. 5. The 'Japanese lantern effect' (2:37 am EST/11:37 pm PST) • Just before and after totality, the difference between the remaining pale-yellow part of the moon and its ruddy-brown coloration can cause the 'Japanese lantern effect'.

  10. 6. Total eclipse begins (2:41 am EST/11:41 pm PST) • As the moon fully enters the umbra, the total eclipse begins, but it is not clear how it will look this time. • During a total lunar eclipse, the moon is visible because the sunlight is refracted around the edge of the Earth by the atmosphere, so the clearer the atmosphere, the brighter the moon. • It's just that this year, with the two eruptions (the Eyjafjallajökull volcano in Iceland last spring and the Merapi volcano in Indonesia in October), there might be one or two clouds of ash and dust, floating high above the Earth. • This is why, this year, the moon can look darker than usual, and even have some parts so dark that they become invisible.

  11. 7. Middle of totality (3:17 am EST/12:17 am PST) • At this point, the moon is shining 10,000 to 100,000 times fainter than just a couple of hours before, its lower half should be dark with hues or chocolate brown or deep cooper, and its upper portion should be brighter, with hues of oranges, reds and even light blues. • Before the moon was covered by the Earth's shadow, its sunlit surface temperature at the equator was somewhere around 127ºC (260ºF), but since there is no atmosphere that can maintain the heat, in the middle of totality, the temperature on the moon has dropped to minus 173ºC (280º F). • That's a very impressive 300ºC (500ºF) drop in just two hours.

  12. 8. The end of the total eclipse (3:53 am EST/12:53 am PST) • The moon starts coming up behind the shadow, and the 'Japanese lantern effect' appears again.

  13. 9. 75% coverage (4:10 am EST/1:10 am PST) • The colors of the moon's disk start to disappear and the retreating shadow becomes black again.

  14. 10. Moon leaves umbra (5:01 am EST/2:01 am PST) • 11. Penumbra shadow fades away (5:20 am EST/2:20 pm PST) • 12. Moon leaves penumbra (6:04 am EST/3:04 pm PST) and this is the official end of the eclipse. • You can see here a table showing the times of all the twelve stages of the eclipse, in different time areas.

  15. Lunar eclipse in June 4 2012

  16. impact • The tides • Scientist said that the tides of the ocean cause by the gravitational force from the moon that orbit the earth and the Moon with tides induces the association of water masses of oceans and with this there is convey of heat • Fertility, Menstruation, and Births • The possibilities of lunar effects on menstrual were explored in 312 university students . And of 312 women, 68 veteran lunar-period cycles (29.5 days). 47 women of that crowd menstruated in the luminosity semi of the month. • Climate • 7.5 days should be affected solar commotion, which supplies power with a quantity of two orders of extent greater than lunar-reflected energy. A different device responsible for climatic deviations is the redeployment of heat on Earth.

  17. Bonus pictures

  18. Bibliography • http://www.altiusdirectory.com/Science/lunar-effect-on-people.php • http://starryskies.com/The_sky/events/lunar-2003/eclipse-Nov8.html • http://library.thinkquest.org/3645/eclipses.html • http://eclipse.gsfc.nasa.gov/lunar.html

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