On June 21, also on the summer solstice, Vietnamese will have the opportunity to observe an interesting partial solar eclipse with a coverage rate of 27 to 79% (depending on location). The total partial eclipse will last more than 3 hours.
The Hanoi Amateur Astronomy Society (HAS) respectfully organizes this event for all astronomy enthusiasts.
Time: From 1:15 p.m. to 4:00 p.m. Sunday June 21, 2020.
Location: Hoa Binh Park – Pham Van Dong Street
Location map: https://goo.gl/maps/kBLxnA7wmoXFQuPs8
Hotline: 0915.971.198 – 0911.014.688 – 0913.611.094
Event link: https://www.facebook.com/events/546444252697869/
What is a solar eclipse?
The Earth revolves around the Sun and the Moon revolves around the Earth. Sometimes these three celestial bodies align with each other. If the Moon is located between the Sun and Earth, blocking sunlight from reaching our planet, then the phenomenon will occur. eclipse.
Although the Sun is about 400 times larger than the Moon, the distance between Earth and the Sun is 400 times greater than the distance to the Moon, so when viewed from Earth, the two celestial bodies appear to be the same size. A miraculous arrangement of creation!
Cause of a solar eclipse: Any place that is completely in the umbra (shadow) of the Moon will have a total solar eclipse, while a place that is only in the penumbra will have a partial eclipse. Source: Tyler Morning Telegraph
Depending on the relative position of the three celestial bodies Sun, Earth and Moon, we observe 3 types of solar eclipses:
- Total solar eclipse: Occurs when the Earth, Moon and Sun are in exactly the same straight line and the Moon barely covers the Sun. This type of eclipse can only be observed in places located in the middle of the shadow (umbra) of the Moon. The sky will then be as dark as twilight.
- Partial eclipse: Occurs when the Earth, Moon and Sun are not actually aligned. At that time, the Moon only partially blocked the Sun.
- Annular solar eclipse: appears when the Moon is furthest from the Earth. The farther it is from Earth, the smaller the Moon appears, so it does not completely cover the Sun but simply looks like a small disk placed on top of the larger disk behind the Sun. This type of eclipse creates a ring-shaped border around the Moon.
From left to right are three types of solar eclipses: partial, total and annular. Source: when is it nextclipse
How will the solar eclipse on June 21 take place?
The next solar eclipse on June 21 will be an annular solar eclipse, but in Vietnam, only a partial eclipse phase can be observed. The path of the eclipse will begin in central Africa, pass through Saudi Arabia, northern India and southern China before ending in the Pacific Ocean. The partial solar eclipse will be visible across much of East Africa, the Middle East and South Asia, including Vietnam.
Unlike last December’s partial solar eclipse, this time people in the north of our country will be able to observe a partial solar eclipse with a higher maximum coverage rate than people in the south. Specifically, the highest coverage rate is 79% (Ha Giang) and the lowest is 27% (Ca Mau).
The table below lists the progress of the solar eclipse of some provinces and cities in Vietnam. You can check the progress of the eclipse and the maximum coverage rate at your home via the Time&Date website.
| Sites | A partial solar eclipse begins | Maximum partial solar eclipse | The partial eclipse ends | Maximum coverage rate |
| Ha Giang | 1:12 p.m. | 2:52 p.m. | 4:16 p.m. | 79% |
| Hanoi | 1:16 p.m. | 2:55 p.m. | 4:18 p.m. | 71% |
| Danang | 1:30 p.m. | 3:04 p.m. | 4:22 p.m. | 56% |
| TP HCM | 1:37 p.m. | 3:05 p.m. | 4:18 p.m. | 36% |
| Ca Mau | 1:38 p.m. | 3:02 p.m. | 4:12 p.m. | 27% |
Partial eclipse. Photo: looptt.com
How to observe a solar eclipse safely?
NASA recommends not looking at the Sun with bare eyes or using regular sunglasses or sunglasses. Sunglasses can reduce the amount of visible light, but cannot block intense ultraviolet rays.
Even more dangerous, absolutely do not look at the Sun with observing devices such as binoculars or telescopes without a suitable filter, as focused sunlight can burn the retina in just a fraction of a second.
The safe way to observe a solar eclipse is to make a small pencil-sized hole in a piece of paper or cardboard, then let sunlight shine through the hole onto a temporary screen like piece of paper. The image displayed on the monitor will be temporarily safer for your eyes.
Eclipse Glasses – a very inexpensive but safe enough device to observe the eclipse.
More professional you can buy eclipse glasses (eclipse glasses) – A compact and lightweight observation device that looks a bit like sunglasses but is able to block harmful radiation from the Sun. For binoculars or telescopes, you need to connect a specialized light filtering device called solar filter (solar filter).
But even so, observing the Sun using a telescope still carries many risks, which require caution throughout the observing process.
Solar eclipse forecast in Vietnam
After this solar eclipse on June 21, Vietnamese will have to wait until 2023 to observe this interesting astronomical phenomenon again. However, this solar eclipse of April 20, 2023 is not at all impressive while in our country the Sun is only obscured by a maximum of 5%.
The two partial solar eclipses of 2027 and 2028 are not very significant because the coverage rate is only 15% and 30% respectively.
Only in 2031 will we see another interesting lunar eclipse when some places in Vietnam will observe a coverage rate of up to 80%.
Do you want to observe a total solar eclipse in Vietnam? Try waiting until April 2070!
Refer to Seasky; Time Date
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