While the idea of a 25-hour day may seem like science fiction,scientists confirm that earth’s rotation is gradually slowing,making such a shift scientifically plausible-though not for hundreds of millions of years. The microscopic changes, driven primarily by tidal forces exerted by the Moon, are being meticulously tracked using advanced atomic clocks adn historical astronomical data. This ongoing process offers a fascinating glimpse into the dynamic forces shaping our planet over vast stretches of time, reminding us that even the most fundamental aspects of our world are subject to change.
Sunday, December 28, 2025 – 08:30 AM WIB
Storykit – The idea that the length of a day on Earth could change from 24 hours to 25 is often dismissed as speculation. However, scientists confirm that this shift is, in fact, a scientifically plausible event.
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It’s important to note that this change won’t be felt by humans anytime soon. The process is incredibly gradual, unfolding over hundreds of millions of years. Understanding these long-term planetary shifts provides valuable context for appreciating the dynamic nature of our planet.
In everyday life, a day is understood to be 24 hours. This refers to a solar day – the time it takes for the sun to return to the same position in the sky.
Astronomers also define a sidereal day, which measures the time it takes for Earth to complete one rotation relative to distant stars. A sidereal day lasts approximately 23 hours and 56 minutes.
This difference demonstrates that Earth’s rotation isn’t a fixed system; its speed can change, albeit on a very small scale.
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According to Ecoticias, Earth’s rotation is experiencing a microscopic slowing down over time. This phenomenon is a natural process that has been occurring for billions of years.
The primary factor influencing this slowdown is the effect of tidal forces. These forces are created by the Moon’s gravity, which pulls on Earth’s water mass.
This pull creates tidal bulges on the ocean’s surface. Because these bulges aren’t perfectly aligned with the Moon’s position, friction occurs.
This friction gradually slows Earth’s rotation. The energy lost in the process is transferred to the Moon, causing it to drift further away from Earth.
Changes in rotation are measured using highly precise atomic clocks. Scientists also utilize historical astronomical records, such as observations of eclipses, to track these changes.
Small discrepancies between atomic time and Earth’s rotation are officially monitored. This data is managed by international organizations like the International Earth Rotation and Reference Systems Service.
So, when will a day actually reach a duration of 25 hours? Scientists estimate this will occur around 200 million years from now.
This estimate assumes the current rate of rotational slowdown remains stable, without any acceleration or extreme changes in the future.
For comparison, millions of years ago, a day on Earth lasted only about 18 to 19 hours. At that time, the Moon was significantly closer to Earth.
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Over time, the effect of tidal forces has gradually extended the length of the day. However, the rate is so small that it is almost imperceptible.
