Earth Heading Towards a 25-Hour Day in Future

Tuesday, December 13, 2016 - 20:12

Scientists have revealed that Earth's rotation is slowing down, gradually increasing the length of the day so our days will be 25 hours long in 200 million years.

A team of astronomers has determined that Earth’s orbit slows almost two milliseconds every 100 years after a review of celestial data spanning 27 centuries, Inhabitat reports.

According to the study published in Proceedings of the Royal Society A: Mathematical and Physical Sciences, if the slowdown continues, and it’s expected to, Earth will eventually experience an extra hour each day.

Scientists have long known that the time it takes for the Earth to rotate on its axis is getting longer. This new study, co-authored by Durham University and the Nautical Almanac Office, has shown when, in the future, a day will be 25 hours long.

The length of a day is increasing at 1.8 milliseconds per century. This is slower than scientists previously believed – which was a rate of 2.3 milliseconds per century. At this rate, a day will be 25 hours long in around 200 million years.

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