eclipse and solar eclipse

Eclipse and solar eclipse
 How eclipse is formed

In the full moon night, when the Sun, the Earth and the Moon are aligned in a straight line, and the Earth is between the Sun and the Earth, it will take place May
Because light travels in a straight line, when the sunlight that Earth opaque, the other side of the globe will be dragging a shadow. Earth's shadow is divided into two parts: by the sunlight and appears not particularly dark part is called the umbra region: because no direct exposure to the sun and not so dark part is called the penumbra.
 The moon will not shine but reflected light of the sun. So when the moon enters the Earth's penumbra, partially blocked the sun, the brightness of the moon will be weakened, this is the beginning of the eclipse. When a portion of the Moon enters the umbra region, partial lunar eclipse will occur. Moon enters umbra when the entire area, total lunar eclipse will occur.
 Eclipse
Image result for 月偏食
 total eclipse
Image result for 月全食
 eclipse process
 eclipse the pain as long as the process of several hours long. When the moon enters the Earth's penumbra, the brightness will drop slightly, but not easily detected by the naked eye shut.
Image result for a simple procedure eclipse












 When the moon enters the umbra region, we will see losses of the moon, which means partial lunar eclipse began. Moon slowly moving toward the Earth's umbra zone, the moon will gradually increase losses. When the moon enters the Earth's umbra center area, we will see a dark red moon, which is the total eclipse. Then, the moon slowly out of the umbra region, total lunar eclipse is over, we will see gradually umbra of the moon.


Process eclipse


Eclipse is due to the sun, the Earth's polar moon three members of the solar system are arranged in a straight line is formed. When transported to the moon between the Sun and the Earth, the moon blocked the sun toward the light, the moon's shadow falls on the earth's surface of the earth, when the eclipse occurs.


In the face of the earth, the moon's umbra only in the area where people will be able to see a total solar eclipse, people in the penumbra can only see a partial eclipse.


Eclipse time is very short, no longer than 15 minutes. This is because the volume smaller than the Earth's moon, so it's umbra region is relatively small.


Solar eclipse occurs when people first see the sun gradually weakened, the sun's surface is gradually covered the shadows, the sky turned dark; when all the sun is hidden, even you can see the sky bright stars and planets.


A total solar eclipse, the moon will cover the whole sun
Image result for 日全食


Partial eclipse, the Moon only cover a portion of the sun
Image result for 日偏食


Annular eclipse, the moon covered only the central portion of the sun
Image result for 日環食


Challenge yourself :
1. When does the eclipse happen?

2. If the Earth is transparent , will the eclipse still happen? Draw an inference.

3. What are the conditions for an eclipse to occur?

4. When the moon enters the Earth's central umbra, what will the moon be like?

5. The solar eclipse will occur on what situation?

6. Why does the total solar eclipse only occurs in certain areas ?

7. Why does a solar eclipse lasts for a few minutes only?