Questions about solar eclipses Lunar eclipse vs new moon Full moon

Solar eclipses always occur on the new moon, which is the first day of the lunar calendar. Reason: The moon moves between the sun and the earth, and the three are exactly in a straight line, the moon will block the light of the sun to the earth, and the black shadow behind the moon will fall on the earth.

Not every new moon is guaranteed to have a solar eclipse. Reason: The orbit of the Moon (white path) and the orbit of the Earth (ecliptic) are not in the same plane. The plane of the white and the plane of the ecliptic have an angle of 5°9.

Both the Sun and the Moon move near the intersection of the white and ecliptic paths, and the Sun is at an angle from the intersection (eclipse limit).

Lunar eclipses always occur on a full moon. Reason: in the lunar calendar.

Ten. 5. 16. The moon moves in the opposite direction to the sun. At this time, if the center of the Earth and the Moon are roughly in the same straight line, the Moon will enter the Earth's umbra and produce a total lunar eclipse.

If only part of the Moon enters the Earth's umbra, a partial lunar eclipse occurs.

Not every full moon occurs a lunar eclipse. Causes: The same reason that solar eclipses don't always occur on the New Moon.

Because there is an angle between the ecliptic and the white way, only when the Earth's shadow is near the intersection of the ecliptic and the white way, can the observer on the Earth reach the lunar eclipse. The number of lunar eclipses that occur each year is generally 2.

This question is just a matter of logic, just like saying that men and women are human beings, but not everyone is a man, the same logic, the relationship between inclusion and being included.

A solar and lunar eclipse must be the same straight line for all three, and a full crescent moon is "near" the same straight line for all three.

Since there is an angle of about 5 degrees between the orbital plane of the Moon orbiting the Earth and the orbital plane of the Earth orbiting the Sun, solar and lunar eclipses do not occur every month.

When a solar or lunar eclipse occurs, the phase of the moon must be a new moon or a full moon, otherwise a solar or lunar eclipse cannot be formed.

A total solar eclipse is neither a full moon nor a new moon. It's on New Year's Day.

Since the moon is a natural satellite of the earth, its orbit is around the earth, and the earth is a planet in the solar system, and the trajectory of the earth is around the sun, so sometimes it will be a special astronomical phenomenon, total solar and lunar eclipses.

The diameter of the Sun is about 400 times that of the Moon, so only when the orbits of the Sun and the Moon "meet" and the distance between the Sun and the Earth is at least 400 times the distance between the Sun and the Moon can the Moon completely block the direct light of the Sun and the Earth, forming a total solar eclipse.

A sarro cycle is 6585 1 3 days (equivalent to 18 years or 18 years (if there are 5 leap years), which is the periodicity of the solar eclipse discovered by the ancient Babylonians. Bridge fluid.

Solar eclipse: Earth-Moon-Sun or Sun-Moon-Earth (Moon in the middle).

Lunar eclipse: Moon-Earth-Sun or Sun-Earth-Moon (Earth in the middle).

The Sun, Moon and Earth are roughly in a line, and the Moon forms a total solar eclipse in the middle of the Sun and Earth. This phenomenon mostly occurs on the first day of the new month (when the moon phase is the new moon).

The sun, moon and earth are roughly in a line, and the earth forms lunar eclipses (total lunar eclipses, annular lunar eclipses, partial lunar eclipses) between the moon and the sun, and most of them occur in the lunar calendar.

The fifteenth and sixteenth (full moon) moon also moves with the earth around the sun in the process of orbiting the earth.

First of all, it is necessary to understand what a solar eclipse is, a solar eclipse, also known as a solar eclipse, is the movement of the moon between the sun and the earth, if the three are exactly in the same place.

When it is in a straight line, the moon blocks the light from the sun towards the earth, and the dark shadow behind the moon falls exactly on the earth, and the sun occurs.

Food phenomenon.

Solar eclipses and new moons are two completely different phenomena. A solar eclipse is a phenomenon in which the Moon is partially or completely obscured as it passes past the Sun as it passes from the Earth. The crescent moon refers to a phenomenon formed by the position of the sun, the earth, and the moon when the moon orbits the earth.

Solar eclipses are because when the moon is in a straight line with the sun and the earth in the process of orbiting the earth, the sun's rays are blocked by the moon, and the sun will be blocked from the earth. At this time, if the sun is completely obscured, it is a total eclipse; If it is only partially occluded, it is partially eclipsized.

The new moon is because the moon's orbit around the earth is elliptical, and when the moon goes around the back of the earth and the sun is also on the back side of the earth, the sun's rays cannot reach the earth. At this time, the moon looks like a dark moon, and a crescent moon is formed.

In general, although solar eclipses and crescent moons are both phenomena caused by the relationship between the sun and the moon, their formation principles and manifestations are completely different.

The difference between a new moon and a lunar eclipse is that it has a different cause, and the moon changes at a different rate. And when the moon is between the earth and the sun, we can hardly see the part of the moon that is illuminated by the sun, which is the end of the lunar month or the beginning of the month, and we see that you shen is the first moon, and if it is specific to the beginning of the month, it is the new moon.

A lunar eclipse is another situation, that is, the sun, the earth and the moon are also in a straight line, and the moon is located in the shadow of the outer side of the earth, and the moon does not shine on the sun, then it is a lunar eclipse from the earth.

The phases of the moon change very regularly, one cycle per month. Lunar eclipses change more quickly, usually in a matter of hours from start to finish.

A lunar eclipse is a special astronomical phenomenon in which when the Moon moves to the shadow part of the Earth, the area between the Moon and the Earth will be obscured by the Earth's rays, and a piece of the Moon will be missing.

At this time, the Sun, the Earth, and the Moon are exactly (or almost) in the same straight line. Lunar eclipses can be divided into three types: partial lunar eclipses, total lunar eclipses, and penumbral lunar eclipses. Lunar eclipses can only occur around the 15th day of the lunar calendar.

1. The occurrence cycle is different: the new moon is a common astronomical phenomenon, the cycle is one month, and this phenomenon can be observed on the first day of each month of the lunar calendar; A lunar eclipse is a special astronomical phenomenon with a cycle of about one and a half years.

2. The principle of occurrence is different: the crescent moon is the moon running between the sun and the earth, the moon faces the earth with its dark side, and rises and falls with the sun, this astronomical phenomenon is called the crescent; The lunar eclipse refers to the part of the shadow where the moon moves to the earth, and the part of the earth between the moon and the sun, which can be illuminated by the sun's rays, and some or all of it cannot be illuminated by direct sunlight, so that observers on the earth cannot see the ordinary moon phases.

That's right, a solar eclipse occurs at the time of the new moon, which is around the first day of the lunar calendar. On the contrary, a lunar eclipse occurs at the full moon around the fifteenth day of each month. At this time, the Moon moves into the shadow of the Earth.

Since the Earth's projection in the Moon's orbit is always larger than that of the Moon, an annular lunar eclipse will not occur.

A solar and lunar eclipse must occur within a certain boundary of the yellow and white nodes of the new moon and the full moon, which is called the "eclipse limit". Calculations show that for a solar eclipse, a solar eclipse can occur if the crescent moon is within about 18 degrees near the intersection of the ecliptic and white paths; If the crescent moon is within about 16 degrees near the intersection of the ecliptic and white paths, there must be a solar eclipse.

For a lunar eclipse, a lunar eclipse can occur if the Moon is within about 12 degrees of the intersection of the ecliptic and the white point; If the Moon is within about 10 degrees of the intersection of the ecliptic and the white way, there must be a lunar eclipse.

This is not true. It should be: as long as there is a lunar eclipse, it is a full moon, and as long as it is a solar eclipse, there is a new moon. But not all new moons have solar eclipses, as long as there are full moons, there are lunar eclipses. What is the reason, I will tell you slowly:

As we all know, the sun shines, but the earth and the moon themselves do not, and the moon is silvery white by reflecting the sun's rays. The moon revolves around the earth, and the earth revolves around the sun with the moon revolving around it. The diameter of the Sun is about 1.4 million kilometers, which is about 400 times the diameter of the Moon at 3,500 kilometers.

However, the average distance between the Moon and the Earth is only about 380,000 kilometers, which is roughly 1/400th of the average distance between the Sun and the Earth. Therefore, the apparent diameter of the Sun (the solar wheel) is almost the same as the apparent diameter of the Moon (the lunar wheel), both of which are 32'. However, since both the Moon and the Earth orbit are elliptical (the Earth and the Sun are located at the focal point of the lunar and Earth orbital ellipses, respectively), the Sun-Earth and Moon-Earth distances will vary slightly.

On the other hand, the lunar calendar is formulated based on the changes in the phases of the moon. The moon phase is the shape of the moon that one sees illuminated by the sun. The cycle of the moon's phase change is days, called synodic months, which are the average length of a lunar month.

When the moon moves between the sun and the earth (the three are not necessarily in a straight line), towards the earth is the unilluminated hemisphere of the moon, that is, the invisible black moon, which is astronomically called the new moon, that is, the new moon, which corresponds to the first day of the lunar calendar. When the moon moves in the opposite direction of the sun, that is, the earth is between the sun and the moon, people see the hemisphere illuminated by the sun, which is the full moon, also known as wang, which corresponds to the fifteenth and sometimes sixteenth of the lunar calendar.

If the Earth's orbit around the Sun and the Moon's orbit around the Earth are in the same plane, then a solar eclipse occurs when the Moon moves between the Sun and the Earth on the first day of the lunar calendar. On the fifteenth or sixteenth day of the lunar calendar, the earth is in a straight line between the sun and the moon, which will cause the moon to be in the shadow of the earth, and a lunar eclipse will occur. However, in reality, the earth and lunar orbits are not on the same plane, but are inclined to each other at an angle of 5°9, so in general, there will be no solar or lunar eclipses that obscure each other on the new and lunar days.

A solar eclipse occurs only when the moon moves near the boundary between the plane of the earth's orbit and the plane of the moon's orbit on the new sun, and the sun, moon and earth are exactly or nearly in a straight line. Similarly, a lunar eclipse occurs when the Moon moves near the boundary between the lunar and the earth's orbit while looking at the sun. This is why not all lunar eclips occur on the first day of the new year and lunar eclipses on the fifteenth or sixteenth of all lunar eclips.

Hope it helps!

Not every new moon and full moon will occur a solar and lunar eclipse respectively, this is because the Earth's orbital plane and the moon's orbital plane are not in the same plane, but vary within a certain range, and a total lunar eclipse occurs if and only if the two planes coincide, a total solar eclipse (annular solar eclipse. ）

As for partial eclipse, it occurs when the angle between two planes is close to 0°.

When the sun, the earth, and the moon are in the same straight line: 1A total lunar eclipse occurs when the Earth is halfway between the Moon and the Sun (when the Moon is full), 2When the Moon is halfway between the Earth and the Sun, a total or annular solar eclipse occurs (when the Moon is a new moon).