Why don't we notice the Earth's rotation? Detailed answer

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Why don't we notice the Earth's rotation? Detailed answer

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Why don't we notice the Earth's rotation?

For a long time, people believed that the Earth was flat as a pancake and was supported by three whales (or three elephants). With the development of science, people's ideas about the Earth have changed. Although we know today that the Earth is moving, it is impossible for a person to notice this, being on its surface. It rotates with it and is too small compared to the huge globe.

We do not notice the rotation of the Earth, but we observe and feel its consequences - the change of day and night. If the Earth did not rotate, then on the side that faces the light, there would always be day, and the opposite side would always be in darkness. But it's good that this doesn't happen. Each point of the Earth is first on the illuminated side, then on the dark side. After 24 hours, everything repeats, since the period of the daily movement of the Earth is 24 hours.

We also do not notice the movement of the Earth around the Sun, but we cannot but see and feel the change of seasons. The Earth revolves around the Sun in 365,25 days. This period of time is called a year.

And together with the Sun and other planets, the Earth moves relative to the Milky Way. The Milky Way moves relative to other galaxies. There is nothing stationary in the universe.

Author: Cellarius E.Yu.

Random interesting fact from the Great Encyclopedia:

Who made the first clock?

When we talk about watches, we mean a device for measuring time. But man had known ways of counting time long before he invented such devices. Sunrise and sunset were the first indicators of time. The increase and decrease in shadows from sticks, stones and trees also served to tell time. The movement of the stars also served man as something like a giant clock. He noticed that as the night wore on, various stars became visible.

The ancient Egyptians divided the night into twelve time periods corresponding to the rising of 12 stars. They divided the day in the same way, and our 24-hour day is based on the Egyptian division of day and night. The Egyptians also made shadow clocks - wooden bars with signs. Ultimately, these shadow or sundials, having 12 periods for dividing the day, were the first hours.

The next types of clocks were water and fire. The sliced candle counted time as it burned from slice to slice. And in the water clock, a plate with a small hole at the bottom was placed on the water. After a certain time, the floating saucer fills with water and sinks. About 2000 years ago, man invented another type of clock - hourglasses. They consisted of two hollow glass vessels connected so that the sand could be poured from one to the other. The upper vessel was filled with sand in such quantity that it spilled out into the hole within an hour.

Around 140 BC, the Greeks and Romans used the cogwheel to improve water clocks. The float, placed in the vessel, rose when the water flowed in a thin stream into the vessel. It was connected to a gear wheel. The wheel turned the hand, which gradually moved from one hour mark to another. And after 1400 years, the first mechanical clock was invented. The load was tied to a string, which turned the coil, which in turn moved the axis of the cogwheels and gears. The wheels turned the arrow on the dial.

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