Learn about the phenomenon of eclipse and eclipse

In the following article, we find out what eclipse phenomenon, eclipse is? Why is it so interested in astronomers?

What is eclipse?

Solar eclipse is a phenomenon of the sun obscured by the moon when viewed from the earth.

When does eclipse happen?

Solar eclipse occurs when the Moon passes between the Earth and the Sun and observes from Earth, at which time the Moon completely obscures or part of the Sun.

For solar eclipses to occur, the Sun, Moon and Earth must lie on a straight or nearly straight line, this alignment is known by astronomers as syzygy . This can only happen in the new moon.

Although a new moon is needed for a solar eclipse, a solar eclipse will not occur on every new moon. Because the Moon's orbital plane travels around the Earth at an angle of about 5 ° to the Earth's orbital plane moving around the Sun (zodiacal plane). Places where these two planes meet each other are called lunar nodes. A solar eclipse occurs only when a new moon takes place near this node.

3D illustration of an eclipse.

Classification of eclipse

There are 4 eclipse types and they are determined by the shadow areas of the Moon on the Earth's surface.

1. Total solar eclipse : A total solar eclipse occurs when the Moon completely obscures the Sun and forms shadows and dark shadows on the Earth's surface / A total solar eclipse can only take place when the Face Moon is around orbit. You can observe the total solar eclipse when standing on the path of the dark area of ​​the Moon. Those who are not in the shadow zone but if standing in the shadow area will observe a partial eclipse.
2. Partial solar eclipse: A solar eclipse occurs when the Moon does not completely obscure the Sun disk and only forms a shadow area on the Earth's surface.
3. Solar eclipse recommends : The eclipse of Japan suggests that the area of ​​the shadow area appears on Earth. The Moon disc will obscure the center of the Sun's disk, revealing the outer edge of the Sun in the form of a ring. An annular eclipse can only happen when the Moon is around an orbit.
4. Futuristic Japanese: Hybrid eclipse is very rare. They happen when an annular eclipse turns into a total solar eclipse.

The eclipse of the annals.

How to observe eclipse

The direct observation of the solar eclipse by eye can often cause permanent damage to the eyes so the observer must be very careful. Note that after observing an eclipse, it is not observed directly with the naked eye.

1. The observation of a solar eclipse with a sunglasses (black glasses), X-ray film, floppy bowel, video tape is not guaranteed because these types only reduce the brightness and not prevent harmful radiation.
2. Observe an eclipse indirectly or use a dedicated filter such as a filter for a 14-digit welder or Sun filter from Astronomy Clubs.
3. The observer can also use a cover to catch the image of the Sun through a small binocular or telescope, or cut a small round hole into the cover and observe the Sun's image through that hole in the face. land.

What is the real moon?

The real moon is the moon phenomenon obscured by the shadow of the earth before the sun's light, also known as the Blood Moon, is an astronomical phenomenon when the Moon enters the shape of the Earth's shadow, facing Sun.

Since the moon does not emit light itself, we see the moon because of the light of the sun on the moon, the moon reflects the light so we see the moon, but at the time of the moon - the earth - the sun is aligned, the earth obscures the light of the sun to the moon, ie the moon is behind the earth's shadow, now the moon is darkened by being hidden behind the earth, this time and phenomenon is called eclipse.

3D illustration of a lunar eclipse.

Classification of real Moon

1. Total eclipse : occurs when the Sun, Earth and Moon lie in a straight line. The moon enters the shadow of the Earth. Moonlight will be dimmed at this time and the Moon will be red or dark orange. When the full lunar eclipse took place, the sun's rays before reaching the Moon were projected at the tip of the Earth and refracted by the Earth's atmosphere. The short-wavelength light rays were all blocked, leaving only long-wavelength rays (red, orange) penetrating, so the Moon often appeared under light red. The maximum duration of the total eclipse: 104 minutes (recurrent cases).
2. Partial eclipse : occurs when the Sun, Earth and Moon lie on a straight line. Moonlight will be dimmed at this point and the Moon is partially missing. It is possible to see the shadow of the Earth in black (or dark red) obscuring the Moon. During the full lunar eclipse, partial eclipses may appear before and after the total eclipse. Moonlight part lasts 6 hours.
3. Dark Moon : occurs when the Moon passes through the dark half of the Earth. At this time the moonlight will dim and the Moon will be dim and dark. True eclipses sell parts that are difficult to see with the naked eye due to reduced sun glare.

The real moon is one of the most astounding astronomical events.

How to observe the real Moon

The real moon is one of the most astounding astronomical events. Just go out and admire. You don't need telescopes or other support tools. However, with binoculars and small telescopes will provide a detailed picture of the moon's surface.

How many solar eclipses, eclipses every year?

Almost every year there are about 4 solar eclipses - the lunar eclipse, which is the minimum number of solar eclipses - the lunar eclipse can happen in 1 year. 2 out of 4 solar eclipses, this eclipse must be a solar eclipse. In 1 year it can happen up to 7 solar eclipses - eclipses, but very rare (5 eclipses and 2 eclipses, or 2 eclipses and 5 eclipses).

There may be a minimum of 2 and a maximum of 5 solar eclipses in a year. In addition to this number, no more than 2 lunar eclipses can be a total eclipse. Very rape when happened 5 solar eclipses in the same year.

According to NASA calculations, only about 25 times of the 5000 years of the world have 5 solar eclipses in the same year. The last time happened in 1935, and the next time will be 2206, when there are two total solar eclipses in December.