Vietnam can admire the half-moon eclipse on the morning of September 17

From midnight on September 17, in Vietnam, the phenomenon of half-dark eclipse will be observed. Moon half-moon only makes the moon a little dimmer, very difficult to see with the naked eye.

From midnight on September 17, in Vietnam, the phenomenon of half-dark eclipse will be observed. Like other lunar eclipses, the half-moon eclipse occurs when the earth lies between the sun and the moon, all three bodies lying close to each other. Thus, the earth will hide the light from the sun to the moon, resulting in the moon being darkened.

Compare the change in the brightness of the moon before and between the half-moon eclipse on November 20, 2002.The brightness of the moon is only slightly reduced, and it is difficult to see with the naked eye.(Photo: Fred Espenak).

If these three celestial bodies are lined up, there will be a full lunar eclipse, the moon will be completely covered with light, and only the long red wavelength of light will pass through the earth's atmosphere, as a result, the moon will be orange-red when full eclipse occurs.

When a half-moon eclipse occurs, the moon will enter the outermost edge of the earth, which is called the midnight region , or penumbra in English. When the moon gets into this part, it will be shrouded in light by the earth, but only partially obscured by the darkness, resulting in the moon's light falling and fading a little.

The observed areas Moonlight half a night at midnight September 17 is colored purple.(Photo: TimeAndDate.com).

Although the luminosity of the moon at the time of the half-moon eclipse is reduced, it is unclear, you have to observe carefully and have a sharp pair of eyes, or take a photo, to realize it the change in the brightness of the moon now.

The real moon half a night will take place from 23:55 on September 16 until 3:54 am on September 17. Here is the time the moon rises and the time that occurs in some localities.

1. The moon entered the dark half of the earth
2. The moon grows
3. Maximum eclipse
4. The moon left the dark half of the earth
5. The altitude of the moon compared to the eastern horizon at the beginning

Moon rise time and time occurs in some localities.

The real moon occurs when the sun, the earth and the moon lie in line, with the earth in the middle. At this time, the earth will cover the light from the sun to the moon, and the earth will see the surface of the moon gradually darkening.

If the three celestial bodies are perfectly aligned, you will have a total eclipse, which will completely cover the light from the sun to the moon, but the long wavelengths of light like red and orange will pass through. obtain the Earth's atmospheric layer and make the surface of the surface red and orange.

You can completely observe the eclipse directly with the naked eye, look through the telescope or telescope to get a clearer view.