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 Why Is There A Leap Year With 366 Days? Why Did February 2020 Have 29 Days?
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DESCRIPTION:

Since Earth completes one revolution around the sun in 1 year, it would make sense

to think that after the completion of year, Earth would be exactly at the same spot 

where it was at the beginning of the year, wouldn't it? But is it actually true?

 

TRANSCRIPT: 

Earth takes 365 days to complete one revolution around the Sun which means  that it traces 

the entire length of its orbit in that time. So, does this mean that during  its never-ending journey 

around the Sun earth comes back to the exact same spot on your birthday every year? 

That's pretty special if you think about it right. Earth is very punctual in its habits.

Our planet takes 24 hours to rotate once on its axis, and 365 days to complete one revolution 

around the central star of our solar system, the Sun, only. It's not exactly 365 days. 

It's a tad bit more than that the exact time taken by Earth's travel around the Sun one time comes

out to be three hundred and sixty five point two four to one  eight nine one days which is generally rounded off to 365.25 or 365 days and six hours.

Thus, in one year earth takes 365 days and six hours to complete one revolution around the Sun. 

If earth were to take precisely 365 days to complete one revolution then theoretically it could be 

said that the planet is at exactly the same spot in its orbit each year on your birthday; however, 

since it takes an additional six hours to complete a full circle around the Sun. It's impossible for 

the planet to be at the same spot every year on your birthday or on any other date whatsoever.

Those extra six hours really complicate things.

They can't just be ignored as doing that would miss calibrate our calendars to such an extent that 

they eventually wouldn't work in sync with the seasons, and by extension plenty

of other things based on seasons would cease to line up properly. That's why, simply 

neglecting those extra six hours is just not an option. 

They must be accounted for somehow if you're wondering that's why leap years are a thing you

see the calendar that we use all over the world. Today, the Gregorian calendar only shows 365 days

in a year and not the surplus six hours as a result, the extra six hours will accumulate each 

year and after every four years. Those extra six hours total 24 hours or in other words a full day

this extra day is called a leap day and the year in which the day is added to the month of February is called a leap year. However, February twenty-ninth is not an extra day in our lives. It's simply a

mathematical trick we play to make sure our calendars remain in sync wit Earth's movement 

which ultimately makes our lives easier. 

However, even if Earth took exactly 365 days to complete one revolution around the Sun. 

It still wouldn't be at the exact same spot in space, as it was a year ago. Remember that

our entire solar system including the Sun Earth and all the other celestial bodies it contains is

moving as a single entity around the central black hole of the Milky Way. The whole solar system 

is also moving very fast with an average velocity of eight hundred and twenty eight thousand 

kilometers per hour yet even at that incredible speed.

It still takes our solar system roughly 230 million years to complete a single revolution around the Milky Way. So, Earth does not come to the same spot in space on your birthday every year rather it continues

to hurtle through space at an extreme speed. Never truly occupying the same location twice while simultaneously circling our beloved sun. 

 

 

 

QUESTIONS: 

1. How long does Earth take to complete one revolution around the sun? 

2. Do you think Earth comes back to the same spot every year on any given

       day, say, your birthday? Why to you think so? 

3. If the Sun disappeared completely, what would happen to the

      Earth and the rest of our solar system?

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2020-06-24 ¿ÀÈÄ 5:19:50
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