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Leap Into 2008 Was Miles Early

New year has an extra day to keep calendar and planet synchronized

By Rob Quinn,  Newser Staff

Posted Jan 2, 2008 12:18 PM CST
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(Newser) – The Earth finished another rotation around the sun in 2007—just about. At midnight on December 31, it was actually about 400,000 miles short of where it had been a year before, and that annual shortfall is why we have leap years, explains the St. Louis Post-Dispatch. Leap years like 2008 have an extra day to ensure the calendar and seasons keep pace.

The old Julian calendar was a fraction off, which Pope Gregory XIII fixed in 1582 by taking a few leap years out and removing 10 days from that year's October. The Earth is gradually slowing down and making fewer rotations as it orbits the sun, but it will be thousands of years before the Gregorian calendar needs any changes.

The Earth as seen from space. The Earth is very gradually slowing down - 400 million years ago, it rotated 420 times during its journey around the sun. (AP Photo/Courtesy of Earth Sciences and Image Analysis Laboratory, NASA Johnson Space Center)
The Earth as seen from space. The Earth is very gradually slowing down - 400 million years ago, it rotated 420 times during its journey around the sun. (AP Photo/Courtesy of Earth Sciences and Image Analysis...   (Associated Press)
Since the Earth rotates 365.24 times on its journey around the sun rather than an even 365, leap days are added to the calendar.
Since the Earth rotates 365.24 times on its journey around the sun rather than an even 365, leap days are added to the calendar.   (Shutter Stock)
When Julius Caesar came up with the Julian calendar, he made every fourth year a leap year with an extra day so the calendar would keep pace with the seasons.
When Julius Caesar came up with the Julian calendar, he made every fourth year a "leap year" with an extra day so the calendar would keep pace with the seasons.   (Shutter Stock)
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2008 a leap year, in some calendars
Jamaica Observer

 
calendars • Earth • leap year • Gregorian calendar • Pope Gregory XIII • Julian calendar

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