New Delhi: A few days later, the new year is about to begin. Before this, let us tell you that today is December 21, it is known as the shortest day of the year. Yes, today the sunlight falls on the earth for the shortest time. As everyone knows that December 21st is the shortest day of the year, but do you know the reason behind it, don’t you? So let’s know what is the reason behind this…
Know what happens on 21st December
Let us tell you that today i.e. on 21st December is the shortest day in many countries including India. Yes, the shortest day means the time between the rising of the sun and the setting. On this day the sun stays for less than its fixed time and the sun sets soon. This makes the day shorter and the night longer. That is, the sun spreads light from its rays on the earth for a short time. Hence 21st December is known for the shortest day of the year.
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Why does this happen
After getting all this information, such a question must have come in your mind that why this happens. First of all, let us tell you that this does not happen in every country. Yes, this happens only in the countries of the northern hemisphere of the earth. At the same time, apart from this, the countries of the Southern Hemisphere have the opposite situation and have the longest day there. Giving information about this, let us tell you that the earth is tilted on its axis by twenty three and a half degrees. Because of this, the distance to the Sun becomes greater than the northern hemisphere of the Earth. By the way, all the planets are slightly tilted in their orbit.
This means that the spread of the sun’s rays is on the earth for a short time. On December 21, the Sun enters Uttarayan from Dakshinayana. On this day the sun’s rays are perpendicular to the Tropic of Capricorn and touch the Tropic of Cancer obliquely. Because of this the sun sets early and the night comes early. That is, when the earth rotates on its axis, the rays of the sun falling at one place affect the interval of the day, due to which the day becomes shorter and longer.