When viewing a celestial object , if another celestial object obscures it , an eclipse occurs. When such an event occurs , a celestial object may disappear completely or partially. When one celestial object completely disappears behind another celestial object , and then from the third celestial object it is called full eclipse. Similarly, if a celestial object is partially hidden , it is called partial swallow or fragmentary swallow. The eclipse is observed from a third celestial object. Eclipses of the sun , earth , and moon are observed from the earth. The eclipse is not just about the moon , the sun , and the earth. Much of it remains unknown to the common man. The two most known eclipses to the common people of the world are the solar eclipse and the lunar eclipse. In the solar system , the earth revolves around the sun, and the moon revolves around the earth. Sometimes the sun , the earth and the moon are in the same straight line during this strange rotation. And then lunar eclipse or solar eclipse is created. Scientific experiments show that solar eclipses are more frequent than lunar eclipses. The ratio of solar eclipse to lunar eclipse is 5: 2 or 4: 3 in every seven eclipses. According to this rotation , when the moon is positioned between the sun and the earth , the sun moves behind the moon, subject to the observation of the earth's surface observer, and then the solar eclipse occurs. Solar eclipse This time the sunlight is interrupted by the moon. As a result, the shadow of the moon falls on the earth. The size of the sun is so large that the moon cannot cover the eclipse completely. In particular, the sun's hemisphere and spectrum can be seen brightly around the four sides of the moon. This condition is called ringworm. Attempts were being made to measure the period of the eclipse from the Babylonian civilization. People are able to predict the eclipse of 1000 BC. At that time astrologers noticed that eclipses were repeated every 16 years and 10 days. This led to the practice of identifying total solar eclipses with the Saros cycle (repetition cycle). On July 22 , a total solar eclipse was observed from Bangladesh which was the 36th eclipse of the 138 Saroschakra and the total number was 61. Each Saroschakra ends with about 75 eclipses. During a total solar eclipse, the darkness of the night falls suddenly during the day and a sudden change occurs in the surrounding natural environment. The birds begin to return to the forest with the hint of evening , the wind calms down , and the temperature suddenly drops. Lunar Eclipse When the earth moves between the moon and the sun , the moon falls behind the earth and a lunar eclipse occurs. The sun is a star, its light is blocked on the earth and the moon is covered with the shadow of the earth. Since the earth is larger than the moon , the earth's shadow completely covers the lunar surface. For this reason lunar eclipses are seen as eclipses in some parts of the earth.