In Vietnam, the dark half of the lunar eclipse (penumbral eclipse) starting at 15h15 when the moon enters the Earth's shadow at half, but the half-dark lunar eclipse will be very difficult to identify because the moon is only a little darker than normal. Observation time should be 16h14, when the Moon on the Earth's shadow, eclipse phase begins part (partial eclipse), the color of the ball on the Moon in the Earth will gradually shift from gray to black flushed when the shadows grow.
Lunar Eclipse (total eclipse) luc17h25 and start the whole moon will turn red. It peaked at 17h54 at the Moon is clearly tinged with red, the most beautiful, so this phenomenon is also called "blood moon".
Viewers continue to observe the full eclipse phase until 18h24. Then the moon will slowly out of the shadows, the color gradually returned to normal until out of the darkness and ends at 19h34 partial lunar eclipse.
According to Dang Tuan Duy, club amateur astronomers Ho Chi Minh City (HAAC), the Vietnam lunar eclipse observed favorable part; full phase also is difficult to observe due to the weather and moon are positioned very close to the eastern horizon and prepare to grow.
"This time is always cloudy sky is due to the rainy season in Vietnam, unstable weather and a full lunar eclipse ends at 18h24, the moon was just rising 11 degrees above the horizon, it is difficult to observe the lunar eclipse at full phase, "he said urging viewers Duy need in place so empty observation in the east and the clouds at the horizon.
This is the second lunar eclipse of the year. Last time took place on 14-15 / 5 but Vietnam is not observed. According to experts, the eclipse observations, the viewer does not need eye protection that can with the naked eye. But if you use binoculars and small telescopes will clearly see the red surface of the moon.
What is an eclipse?
Earth Solar lighting also prevent light rays from the sun creates a shadow zone extends in space. Moon around the Earth in a circular motion should be able to "go" in the dark. At this time the Moon is no longer direct sun light should not light up as normal.
Shadows created by the moon split into two areas, penumbra (Penumbra) and dark (Umbra). If the Moon in orbit around the Earth's penumbra it went into the half-dark lunar eclipse will take place, if the Moon enters the shadow will eclipse the full or partial happening.
Due to the orbital plane of the Earth around the sun and the plane of Earth's orbit around the Moon at an angle of more than 5 degrees so a lunar eclipse occurs infrequently. If two planes overlap, there will be renovation and lunar eclipse every month.
