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Old 12-28-2005, 10:32 PM   #1
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Default Klok 1 sec. terug op oudjaar 2005

New Year 'delayed' by leap second

There have been 22 leap seconds since 1972
Scientists are delaying the start of the new year by adding the first "leap second" in seven years.
The Paris Observatory said an extra second would be added to clocks worldwide at the stroke of midnight on 31 December.

Leap seconds are required every so often to keep our clocks in sync with solar time used by astronomers.

"Enjoy New Year's Eve a second longer," said the researchers at the US National Institute of Standards and Technology.

Tidal friction

The International Earth Rotation and Reference Systems Service, based at the Paris Observatory, tells the world every six months whether to add or subtract a second from atomic clocks, the standard for everyday timekeeping.

A leap second is added to Co-ordinated Universal Time (UTC) to keep it in step with solar time - based on the Earth's rotation on itself - to within a second.

Tidal friction causes the Earth's rotation to slow down, which means that solar time tends to drift out of sync with atomic clocks.

If this disparity was not corrected, the error could increase to several seconds within a few decades; and would very quickly make software and possibly hardware used by astronomers obsolete.

There have been 22 leap seconds added - and no subtractions - since the first one on 30 June, 1972.

The new leap second will be inserted at the end of the final minute of 2005, giving the familiar "six pip" BBC radio time signal an extra pip before the long pip marking the hour.

http://news.bbc.co.uk/2/hi/science/nature/4562194.stm
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Old 12-28-2005, 11:08 PM   #2
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Default Re: Klok 1 sec. terug op oudjaar 2005

Ga jij 1 sec terugdraaien? ;D ;D
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Old 12-29-2005, 10:49 AM   #3
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Default Re: Klok 1 sec. terug op oudjaar 2005

ohja geweldig hoor, die ene seconde
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