From the night of June 5 to the early morning of June 6, Vietnamese can fully observe the lunar eclipse in the dim light. The following article will provide you with important information to help you observe this phenomenon.
Why is there a lunar eclipse?
A lunar eclipse is a phenomenon that occurs when the Moon, Earth, and Sun are respectively in a straight (or nearly straight) line and the Moon passes through the Earth’s shadow. So the Moon and the Sun are on opposite sides of the Earth. Therefore, a lunar eclipse only occurs during a full moon. Due to the distance between the Moon, Earth, and Sun, Earth’s shadow is actually divided into two regions: the umbra region and the semi-dark region.
Lunar Eclipse Explanation: When the Moon enters penumbra, a penumbral eclipse occurs. When the Moon enters its umbra (shadow), a partial lunar eclipse occurs. A total lunar eclipse occurs when the Moon is completely in shadow. Photo: NASA
Due to this partition, lunar eclipses are divided into three types.
The first is Midnight Lunar Eclipse – occurs when the Moon crosses the penumbra of the Earth. At this point, the Moon is only slightly darker, so a penumbral eclipse is generally less desirable than the other two types.
The second type is partial lunar eclipse, which takes place when the Moon passes through the penumbra and continues into the umbra. At that time, the Full Moon will be partially lost like a giant cookie with a bitten corner.
The third most anticipated type – total lunar eclipse – appears when the Moon is completely in the shadow of the Earth and completely obscured. However, the Moon does not “disappear” but appears with an enchanting red light. Before and after a total lunar eclipse, there are always penumbral and partial lunar eclipses.
Early Morning Lunar Eclipse Midnight June 6, 2020
Unlike a solar eclipse, a lunar eclipse can be observed from anywhere during the night on Earth, provided, of course, that the sky is clear. From some places it is possible to fully admire the eclipse process, but from other places it can only be seen when the Moon rises or sets.
Photo: The moon at the time of a penumbral eclipse (right image) is only slightly darker than normal (right image). Image source: Earthsky
This lunar eclipse lasted 3 hours and 18 minutes, totally observable in Vietnam. The course of a lunar eclipse is as follows:
|Time (Vietnam time)
|Midnight lunar eclipse begins
|The semi-dark region of the Earth begins to touch the Moon
|Midnight Lunar Eclipse Peaks
|The Moon is closest to the center of the semi-dark shadow
|End of the midnight lunar eclipse
|The moon comes out of the dark
Observing a lunar eclipse is very simple, as long as the sky is clear enough to see the Moon. However, the phenomenon of a penumbral lunar eclipse is not so appealing, as the Moon is only slightly darker than normal.
If you want to see a more remarkable astronomical phenomenon, you have to wait patiently for another 2 weeks. By June 21, we will be able to observe a partial solar eclipse – the most important focal point of the year.
Tham khảo Time & Date & Earthsky