Earth Rotation: 25 Hours a Day – Fact or Fiction?
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Earth’s Rotation: A History of Changing Days
Discussion of changes Earth Rotation is again busy on social media after a number of scientists predicted that the duration of one day in Earth one day it can reach 25 hours. Many think this change will occur in the near future. However, change Earth Rotation itself takes place over a very long geological time scale.
What is meant by Earth’s rotation?
Scientifically, Earth Rotation is the rotation of the planet Earth on its axis. This process causes the change of day and night. Usually, once Earth Rotation lasts about 24 hours. This duration is then used as a reference for the global time system.
However, speed Earth Rotation not wholly consistent at certain speeds.Various cosmic and internal planetary factors influence the rotation rate.
The researchers analyzed dozens of sedimentary rock records that record Earth’s 2.5 billion year history. Analysis was carried out using the method cyclostratigraphy.
This method reads repeating patterns in rock layers that reflect changes in orbit and Earth Rotation from time to time.
The analysis results show that Earth Rotation dose not slow down linearly,but rather experiences long stable periods punctuated by phases of faster deceleration.
A Day on Earth Once Was Only 19 Hours
It turns out, based on scientific facts, a day is not always 24 hours long. The geological record shows that the length of the day was once much shorter than it is indeed now.
Research shows that for about a billion years, the length of a day on Earth has remained around 19 hours.
These findings come from research led by Ross Mitchell, geophysicist from Institute of Geology and Geophysicschinese Academy of Sciences.
According to Mitchell, this condition arises because the tidal force of the atmosphere due to the heating of the Sun almost completely offsets the braking effect of the Moon.
It’s stable Earth Rotation with a duration of 19 hours, it turns out to have a big impact on the evolutionary process. In this period, Earth’s oxygen production was dominated by photosynthetic microbes in shallow seas