How are lunar eclipses formed, and how are lunar eclipses formed?

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. When the Moon enters the penumbra of the Earth, it should be a penumbral eclipse, but because its brightness is weakened very little and it is not easy to detect, it is not called a lunar eclipse, so there are only two kinds of lunar eclipses: total lunar eclipses and partial lunar eclipses. Lunar eclipses occur in the hope (full moon), but not every lunar eclipse occurs, which is the same as not every solar eclipse.

The formation of a lunar eclipse.

A lunar eclipse is a natural phenomenon in which when the Sun, Earth, and Moon are exactly or almost in the same straight line (the Earth is between the Sun and the Moon), the light from the Sun to the Moon will be partially or completely obscured by the Earth, resulting in a lunar eclipse.

For the Earth, the Sun and Moon are 180° apart, so the eclipse must have occurred around the 15th day of the lunar calendar. It is important to note that since the orbits of the Sun and Moon in the sky (called the ecliptic and white paths, respectively) are not in the same plane, but are about 5° angles, only if the Sun and Moon are near the two intersections of the ecliptic and the white path, respectively, will have a chance to form a straight line and produce a lunar eclipse.

There are three types of lunar eclipses: partial lunar eclipses, total lunar eclipses, and penumbral lunar eclipses. A partial lunar eclipse occurs when the Moon enters only part of the Earth's umbra; And when the entire Moon enters the Earth's umbra, a total lunar eclipse occurs. As for the penumbral lunar eclipse, it means that the moon only passes over the penumbra of the earth, causing a very slight decrease in the brightness of the lunar surface, which is difficult to see with the naked eye, so it is not noticed.

Observe the brightness and color of the moon's surface.

The brightness and color of the lunar surface during a lunar eclipse can be distinguished into the following 5 levels: 0, very dim and almost invisible; Grade 1, slightly brighter, blackish-yellow in color, details indistinguishable; grade 2, slightly bright, black-red or brownish-yellow, with some dark spots in the center, rather bright on the outside; Level 3, brick-red, with visible details of the lunar surface, but very faint; Grade 4, copper-red, very bright, bright on the outside, slightly blue, for large details to see. When observing a total lunar eclipse, make a judgment on the brightness and color level of the lunar surface and record it.

It is also necessary to record the weather conditions at that time.

The Moon orbits the Earth every 30 days, and when we look up at the stars at night, we don't notice how the positions of those stars change relative to the Moon. This time is different, during the entire lunar eclipse, if you are careful, you will notice that the relative positions of the Moon and the stars have changed. Don't miss the first lunar eclipse of this century!

1. The formation of a lunar eclipse.

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 sunlight, and a piece of the Moon will be missing.

The Sun, Earth, and Moon at this time happen to be (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.

2. The formation of a solar eclipse.

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 a straight line, the moon will block the light of the sun to the earth, and the black shadow behind the moon falls on the earth, and the solar eclipse phenomenon occurs.

In the process of the earth orbiting the sun and the moon orbiting the earth, when the three celestial bodies of the sun, the earth and the moon form a straight line, and the earth is in the middle, blocking the sunlight towards the moon, a lunar eclipse is formed.

What is a lunar eclipse and how is it formed? Do you understand?

What causes a lunar eclipse?

Primary Science 6th Grade Textbook.

=Encyclopedia Business Card== A solar eclipse, also known as a solar eclipse, occurs when the Moon orbits between the Sun and the Earth. At this time, for parts of the Earth, the Moon is in front of the Sun, so some or all of the light from the Sun is blocked, so it appears as if part or all of the Sun is gone. Solar eclipses only occur at the New Year, when the Moon and the Sun are conjunct.

Solar eclipses are divided into partial solar eclipses, total solar eclipses, and annular solar eclipses. You can't look directly at the sun when observing a solar eclipse, otherwise you will lose sight. =Solar Eclipse Introduction== Figure) A solar eclipse is the movement of the moon between the sun and the earth, if 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 falls exactly to the earth, and the solar eclipse phenomenon occurs.

People in the shadow of the moon on the earth (moon shadow: the shadow cast by the moon on the earth) began to see the sunlight gradually weakening, the sun surface was obscured by a round black shadow, and when the sky turned dark, when it was completely covered, the brightest stars and planets could be seen in the sky, and after a few minutes, the sunlight gradually appeared from the edge of the moon's dark shadow, and began to glow and recircle. Since the Moon is smaller than the Earth, only people in the shadow of the Moon can see the eclipse.

A total solar eclipse occurs when the Moon blocks all the sun, a partial solar eclipse occurs when part of the sun is occluded, and an annular solar eclipse occurs when part of the sun is occluded. A total solar eclipse lasts no more than 7 minutes and 31 seconds. The maximum length of an annular solar eclipse is 12 minutes and 24 seconds.

In order to extend the observation time of the total solar eclipse, an astronomer in France chased the shadow of the moon in a supersonic plane, extending the observation time to 74 minutes. China has the oldest record of solar eclipses in the world, and there have been definite records of solar eclipses more than 1,000 years BC. Solar eclipses generally occur on the first day of the lunar calendar.

Formation of a lunar eclipse: The Sun, Earth, and Moon are in a straight line, and the Earth blocks the Sun's rays. So a lunar eclipse generally occurs at the time of the full moon.

The earth rotates once a day, the moon circles the earth once a month, and the earth circles the sun once a year, so we see the position of the sun and the moon on the earth every day is changing in a complex way, but with the earth as the center and the rotation of the earth alone, the problem is much simpler: looking at the sun with the earth as the center seems to be the sun revolving around the earth once a year, and its trajectory is called the "ecliptic"; There is no doubt that the Moon is orbiting the Earth, and its orbit is called the "white path".

A solar or lunar eclipse occurs as long as the Sun's position on the ecliptic and the Moon's position on the white path coincide with or opposite each other (i.e., the New Moon or Full Moon) as seen from the Earth. However, the white and ecliptic are not on the same plane, but have an angle of about 5°9, which makes the position of the Sun either north or south when the Moon moves to the New Moon or Full Moon position, and the position is staggered from the Earth, and there will be no solar or lunar eclipse.

A lunar eclipse is an astronomical phenomenon in which a bright moon is suddenly blocked by a large black shadow, and it was called "Tiangu eating the moon" in ancient Chinese folklore. In fact, the sun, the earth, and the moon are roughly located in a straight line, and because the earth is centered at this time, it is essentially the moon that drills into the earth's shadow cone, and the moon itself does not shine, and when it reaches the earth's shadow, it does not get sunlight, and it is basically invisible. Obviously, a lunar eclipse is only possible at the "wang" (full moon), which is the half-moon or sixteenth of the lunar calendar.

In the same way as a solar eclipse, most of the "hopes" do not have a lunar eclipse, and only a few "hopes" with the three in a straight line will people see this moving lunar eclipse scene. The number of lunar eclipses per year is a minimum of 0 (no lunar eclipses throughout the year) and a maximum of 3.

What causes a lunar eclipse?

What causes a lunar eclipse?