Scientists discover most accurate clocks in the universe
Pulsars, or stars that pulse due to rapid spinning, may be the best way to keep time in space.
An artist's conception of a pulsar planet. (Photo: NASA)
|
Scientists discover most accurate clocks in the universePulsars, or stars that pulse due to rapid spinning, may be the best way to keep time in space.By Katherine ButlerTue, Jul 13 2010 at 2:21 PM EST
10
An artist's conception of a pulsar planet. (Photo: NASA) Time in space has always been an elusive issue for scientists who have long struggled to find a constant standard. But a new discovery may help us understand time as never before. Space.com reports that scientists are now using pulsars — rapidly spinning stars that pulse over time — to tell the universe’s time. This is due to a recent revelation about how pulsars function and rotate.
A pulsar is a rotating neutron star that emits a beam of electromagnetic radiation. When this radiation is pointed towards the Earth, we can see it much as we see the light from a lighthouse. Discovered in 1967 by Jocelyn Bell Burnell, pulsars occur in space when a star collapses, smashing the protons and electrons together into neutrons. They are so dense that one teaspoon of neutron star on Earth would weigh 1 billion tons.
It seems that these super heavy lighthouses of the universe are also predictable and steady in their actions. Their pulsing sweep of light is almost impeccably timed — almost. Until recently, scientists have been unable to account for a slight variation in the rate. But a new discovery shows that pulsars are slowly but surely slowing down and at two different rates. Further, they switch back and forth between the two rates. Now scientists must adjust the clocks to account for the difference. The end result? Constant time in space.
Why is constant time in the universe important? Andrew Lyne of the University of Manchester in England lead the recent pulsar study. As he told Space.com, "Mankind's best clocks all need corrections, perhaps for the effects of changing temperature, atmospheric pressure, humidity or local magnetic field. Here, we have found a potential means of correcting an astrophysical clock."
Further, experts hope that this new clock can help solve at least one space mystery. Albert Einstein suggested that gravitational waves — ripples in time-space caused by the merging of two black holes — exist in space. Scientists have never been able to find them, but this improved method of reading time may be the key to their discovery. If one of Einstein’s gravitational waves were to pass through a pulsar, it is possible scientists might be able to detect it.
For further reading:
You might also like:
Related Topics: Space
Comments
j7t14r
07/02/2011 18:16 PM
All the scientists seem to be totally ignoring Einstein's "Unified Field" theory, in which both the macrocosm and the microcosm are governed by the same universal laws. Thus an atom is a sun and its orbiting electron a planet, and a star is an atom and its orbiting planet an electron, etc. It makes sense to me, but too much for well invested professionals.
Anonymous
07/27/2011 20:53 PM
Are you oblivious to the fact that general relativity and quantum mechanics aren't good friends? If it was *that* simple the real professionals wouldn't still be struggling to find a Unified Theory (E8 Lie, M Theory, String Theory).
smithgun2011
06/26/2011 17:13 PM
How they know what a teaspoon of a neutron star would weigh? As for black holes, check the "HAWKINS PARADOX" it took a while but his math was proven wrong and he finally had to admit there are no such things as black holes. Proving the existance of something through mathmatical equations just does not make sense to the average person.
pherbl91
05/02/2012 15:54 PM
1) A physicist isn't the average person. Stating that the average person doesn't understand is both obvious and meaningless. 2) Try to understand things before you say them. The paradox says nothing about the existence of black holes. It's about whether or not a black hole destrys all information it comes in contact with. .... More
Sargonarhes
06/03/2011 18:24 PM
Wait a minute "gravitational waves — ripples in time-space caused by the merging of two black holes — exist in space. Scientists have never been able to find them," yet they say black holes are real yet have not really found any? "Mankind's best clocks all need corrections, perhaps for the effects of changing temperature, atmospheric pressure, humidity or local magnetic field." Yet they keep saying a clock in space tracks time more slowly? How can I take what they say serious.... More
John Holroyd
06/05/2011 17:52 PM
If you read the article carefully you will find your conclusions are incorrect. The article said they have never detected gravity waves not black holes. They never said that clocks in space track time more slowly what you are half remembering is that clocks in relative motion to each other track time at different rates and this becomes significant as the speed of light is approached. This would not destroy the utility of a space based clock as long as you knew what corrections to.... More
Andy Van Berkum
05/28/2011 13:38 PM
THIRD!
my name
05/28/2011 13:36 PM
Wouldnt they also need to account for the speed of light which they could easily mess up calculations from their distance from a pulsar?
John Holroyd
06/05/2011 17:59 PM
The speed of light is of no concern. What they need is a timekeeper that does not vary with time or if it does that they know by how much so they can apply corrections.
Rocko Edwardski
05/18/2011 14:58 PM
FIRST! Add your commentSign in with one of these accounts or just add your comment below. |
ADVERTISEMENTADVERTISEMENT |
Copyright © 2012 MNN Holdings, LLC. All Rights Reserved. Website by GLICK INTERACTIVE | Powered by CIRRACORE |
| SPONSORS |