Dog solar eclipse is the ancient Chinese call for the solar eclipse phenomenon, is the moon movement between the sun and the earth, if the three are just in a straight line, the moon will block the light from the sun to the earth, the black shadow behind the moon just fell on the earth, then the eclipse occurs.
Many people think that the celestial eclipse is just a legend, but in the eyes of astronomy enthusiasts this is not a legend, but an astronomical phenomenon, below and Xiaobian to see what is the celestial eclipse!
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Introduction
In folklore, it is said that “the moon moves to the middle of the sun and the earth, if the three are exactly in a straight line, the moon will block the light from the sun to the earth, and the black shadow behind the moon falls exactly to the earth phenomenon” for the eclipse of the sun by a tengu. Eclipses only occur in the new moon, that is, when the moon and the sun are in conjunction. Solar eclipse is divided into partial solar eclipse, total solar eclipse, annular solar eclipse and total annular solar eclipse. You can’t look directly at the sun when observing a solar eclipse, otherwise it will cause temporary blindness, or even permanent blindness in severe cases.
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Kinds
Total Solar Eclipse: The Sun is 400 times wider than the moon, but 400 times farther from the Earth. Because of symmetry, the Moon’s shadow, the shadow that falls on the Earth’s surface, is just wide enough to cover the entire sun;
Partial solar eclipse: Chinese history books say that “there is a solar eclipse, not as good as a hook”, the reason for the partial solar eclipse is because the observer falls in the penumbral region of the moon, the observer will see that part of the sun is obscured by the shadow of the moon, but the other part continues to shine;
Annular Solar Eclipse: When the Moon is at apogee, the Moon’s umbra cone cannot reach Earth
Total eclipse: It only occurs when the earth’s surface is very close to the tip of the moon’s umbra, or the distance between the moon and the earth’s surface is very close to the length of the moon’s umbra. Since the earth is a sphere, and when the shadow cone touches the earth, it is a total solar eclipse (usually in the middle of the eclipse zone). At both ends of the eclipse zone, the shadow cone fails to touch the earth, so only the pseudo umbra can reach the earth. Below, what you see is an annular solar eclipse.
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Scientific explanation
Solar and lunar eclipses are typical examples of light propagating along straight lines in homogeneous media. A solar eclipse does not occur every time the Moon passes between the Sun and the Earth. There are two conditions for an eclipse to occur. First, solar eclipses always occur on the new moon (the first day of the lunar calendar). Not all new moons are bound to have solar eclipses, because the orbit of the moon (white) and the orbit of the The white plane and the ecliptic plane has 9 ‘5 ° Angle.
