See what I mean?
Posted on 12/30/2003 5:44:51 PM PST by e_engineer
The Earth won't be having seconds this year, thank you.
And that has scientists across the world — including those who run the atomic clock at the National Institute for Science and Technology in Boulder — scratching their heads.
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Take a Colorado Ski Vacation Apparently, the Earth isn't slowing down as it used to, and no one knows why.
Flip your calendar back to 1972. That's the year the world began its current system of atomic time-keeping. NIST operates one of the clocks used to set "Coordinated Universal Time."
Scientists soon discovered they had a small problem: The rate at which the Earth travels through space had slowed ever so slightly, and as a result was completing its 365-day journey around the sun one second behind schedule.
To make the world's official time agree with where the Earth actually sat in space, scientists started having the atomic clocks count an extra "leap second" on the last day of the year.
"They came close to matching it, but they had to add a second to keep it in sync," said John Lowe, a NIST researcher who works in the agency's Time and Frequency Division.
For 28 years, scientists repeated the procedure. Then, in 1999, they discovered that the Earth was no longer lagging behind. It didn't need a leap second.
This is the fifth consecutive year that the Earth hasn't lagged behind schedule.
Fred McGehan, a spokesman for NIST, said most scientists agree that the Earth has been very gradually slowing down for millennia. But, he said, they don't have a good explanation for the five years it's been on schedule.
Possible explanations include the tides, weather and changes in the Earth's core.
Contact Ryan Morgan at morganr@dailycamera.com or (303) 473-1333.
Hey,geek boys,Who said the earths orbit is static(as in unchanging).The short time that we've been measuring these things compared to the total life span of the solar system is very small.
See what I mean?
Old people and minorities will be hit hardest.
Subtle. I like it, but maybe it was too subtle. ;-)
You didn't get the memo? Well, if you don't know about Xyra, it's too late for you.
As for me, I have my escape plan already in place:
Can you explain how that would work? I mean 28 years of leap seconds, followed by 5 years without, seems hard to pin on the tides.
Not that the tides don't deserve a bad reputation, what with the rip-tides, and red-tides, and shifty behavior and all. They never show up at the same time two days in a row, and always running out on you, leaving you high and dry when you need them most. Yes the tides are a sneaky bunch, but are they really guilty of this? ;^)
Hmmmmmmmmm.........Localized space-time anomaly?
The Enterprise encountered these all the time.
Satellites move in inertial space, about an Earth that rotates. The motion of the Earth since a fixed epoch (currently noon, January 1, 2000) has to be taken into account for things that depend on the satellite's location over the ground -- some gravitational effects, and the location of radar tracking stations.
We have to account for leap seconds, as that's obviously a component (albeit small) in the equation.
;-)
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