reports According to, scientists have estimated that 1.4 billion years ago, the Earth took 18 hours to complete one revolution on its axis, that is, at that time there was day and night in 18 hours. Due to the Moon moving away from the Earth, the Earth’s rotation speed is continuously decreasing. This has come to light in a study by Wisconsin-Madison University. Researchers studied a rock that was 90 million years old.
The current distance between the Moon and the Earth is 3 lakh 84 thousand 400 kilometers. The Moon takes 27.3 days to make a complete revolution around the Earth. The study says that the Moon is moving away at a speed of 3.82 centimeters every year. Because of this, there may be a 25-hour day on Earth after 200 million years.
In another research, scientists have also said that the distance between the Earth and the Moon, which is 384,400 kilometers today, was 321,800 kilometers two and a half billion years ago and the length of the day was 16.9 hours instead of 24 hours. Researchers say that billions of years ago the Moon was actually closer to our planet and now it is slowly moving away. These researches can help scientists understand the Earth-Moon system.
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