Space

What kind of lunary eclipses are there in the space?

When there is a full moon in the sky, the moon passes aside from the Earth, opposite to the sun and may also make it into the shadow thrown by the globe. When this happens, we have a chance to observe the lunar eclipse, though it will not be always followed by the full moon.

Unlike the sun, the moon doesn’t disappear completely, though it may be fainted. This happens so because part of the solar rays goes through the land surface, then it bends and goes inside the land shadow breaking into the Moon. As the air lets the red rays through in most of the cases, the Moon gains copper-red or brownish color during the eclipse.

The diameter of Earth is 4 times bigger than the Moon’s, while the shadow made by the Earth is 2,5 times bigger the Moon. Therefore, the moon may be completely covered in the Earth’s shadow. The full lunar eclipse is longer than the solar; it may last for 1 hour 40 minutes.

There are as many as 3 lunar eclipses possible in a year. They are repeated within the same period of time as the solar eclipse: 18 years 11 days and 8 hours. This period is called saros meaning repetition. The saros has been calculated since the ancient times. It’s not so difficult to make the calculation and, hence, predict the day on which the eclipse will occur. However, it’s a big problem to predict the exact time of its appearance, as well as the conditions it will be followed by; it took several centuries for the astronomers to study the Earth and Moon movement in order to solve the problem. The possible inaccurate predicted time for the eclipse doesn’t exceed 2-4 seconds.

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