Knowledge of astronomical phenomena _ What is the difference between a penumbral eclipse and a partial eclipse?

The mystery of cosmic knowledge always makes people want to find out. With the development of science and technology, intelligent anthropology has learned a lot of astronomical knowledge that cannot be explained in ancient times. Do you know the difference between a solar shadow and a partial solar eclipse? Let's use constellation knowledge to see the difference between a penumbral eclipse and a partial solar eclipse.

Penumbral eclipse The penumbral eclipse is a special celestial phenomenon, and the moon passes through the penumbra of the earth in the process of orbiting the earth. Astronomical phenomenon of the moon entering the penumbra of the earth. At this time, the earth blocked some light from the sun, and the moon looked darker than usual. If you look at the moon through a telescope, the feeling of darkening will be very obvious. In the process of penumbral eclipse, only when the food score of penumbral eclipse is greater than 0.7 can the naked eye detect it. Zhao Zhi Heng, director of Tianjin Astronomical Society, predicted that there will be a penumbral eclipse on September 17, 2065438. In February of 20 17, astronomical experts introduced that there was a "penumbral eclipse" during the Lantern Festival in 20 17.

Eclipses are a phenomenon in nature. When the sun, the earth and the moon are exactly or almost on 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 blocked by the earth, resulting in an eclipse.

When an eclipse occurs, the direction difference between the sun and the moon is 180 for the earth, so the eclipse must occur in Wangwang (that is, around the fifteenth day of the lunar calendar). It should be noted that the orbits of the sun and the moon in the sky (called ecliptic and ecliptic respectively) are not on the same plane, but have an intersection angle of about 5, so only when the sun and the moon are located near the intersection of ecliptic and ecliptic respectively can they form a straight line and produce an eclipse.

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