Vietnam will watch an annular solar eclipse on May 21

Vietnamese astronomers have the opportunity to see a part of the solar eclipse - an astronomical phenomenon many people pay attention to take place in the morning of May 21.

Talking to reporters, Mr. Dang Vu Tuan Son, President of Vietnam Young Astronomical Club, said that Earth's orbit around the Sun and the orbit of the Moon around the Earth are elliptical so the distance between celestial bodies is not fixed but change.

Basically, the distance from the Sun to Earth is about 400 times higher than Earth and the Moon and the Sun's diameter is also greater than the Moon's diameter with the same ratio. This coincidence leads to the eclipse of the Sun during the total solar eclipse.

The eclipse of the annals

However, there are cases where solar eclipses occur when the Earth is located near the Sun and Moon and is located far from Earth in orbit. At this time, the Moon cannot cover the Sun, leaving a bright edge like a ring, called an annular eclipse.

The annular eclipse phenomenon is about to happen only very few areas of the world can be observed. Land areas can observe this phenomenon including part of the western part of the United States and part of East Asia.

According to NASA calculations, the annular eclipse takes place from about 4 hours 12 minutes and ends around 6: 13 minutes in the morning of May 21 in Vietnam - that is, when the new Sun is not growing high.

Mr. Son also said that on May 21 in Hanoi the sun rises at 5: 17 minutes, this means that at 5:00 am can observe the solar eclipse from the east - when looking towards the horizon. In urban areas, the horizon cannot be seen, the observation time will be later.

With this amazing natural event coming to an end at 6:13, Mr. Son thinks this is a relatively short time to observe. That is not to mention the early morning often cloudy and little night dew so it will partly obstruct the observation.

'Astronomers should observe eclipses with eye safety aids such as the Sun photo box or black polymer glass. Should not be observed with telescopes, binoculars, cameras, " Son recommended.