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Elusive dark matter may be detected with GPS satellites



 
 
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  #1  
Old November 18th 14, 03:14 PM posted to sci.geo.satellite-nav
Hans-Georg Michna
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Posts: 764
Default Elusive dark matter may be detected with GPS satellites

The everyday use of a GPS device might be to find your way
around town or even navigate a hiking trail, but for two
physicists, the Global Positioning System might be a tool in
directly detecting and measuring dark matter, so far an elusive
but ubiquitous form of matter responsible for the formation of
galaxies. ...

Read the complete article at
http://m.phys.org/news/2014-11-elusi...atellites.html

Hans-Georg
  #2  
Old November 19th 14, 12:04 AM posted to sci.geo.satellite-nav
Alan Browne
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Posts: 1,339
Default Elusive dark matter may be detected with GPS satellites

On 2014.11.18, 10:14 , Hans-Georg Michna wrote:
The everyday use of a GPS device might be to find your way
around town or even navigate a hiking trail, but for two
physicists, the Global Positioning System might be a tool in
directly detecting and measuring dark matter, so far an elusive
but ubiquitous form of matter responsible for the formation of
galaxies. ...

Read the complete article at
http://m.phys.org/news/2014-11-elusi...atellites.html



Very cool. But I wonder what massive enough amounts of dark matter near
enough to cause clock differences would do to the earth? If anything.
Wouldn't dark energy do the same thing?


--
Among Broad Outlines, conception is far more pleasurable
than “carrying [the children] to fruition.”
Sadly, “there’s a high infant mortality rate among
Broad Outlines—they often fall prey to Nonstarters.”
"Bestiary of Intelligence Writing" - CIA

  #3  
Old November 19th 14, 08:34 AM posted to sci.geo.satellite-nav
Mike[_8_]
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Posts: 3
Default Elusive dark matter may be detected with GPS satellites

On Tue, 18 Nov 2014 19:04:18 -0500, Alan Browne wrote:

Very cool. But I wonder what massive enough amounts of dark matter near
enough to cause clock differences would do to the earth? If anything.
Wouldn't dark energy do the same thing?


Isn't dark matter meant to be gravitationally attractive whereas dark
energy is repulsive? A bit like opposite sides of Alice's mushroom
(IIRC)...

Mike.
  #4  
Old November 21st 14, 12:07 AM posted to sci.geo.satellite-nav
Alan Browne
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Posts: 1,339
Default Elusive dark matter may be detected with GPS satellites

On 2014.11.19, 03:34 , Mike wrote:
On Tue, 18 Nov 2014 19:04:18 -0500, Alan Browne wrote:

Very cool. But I wonder what massive enough amounts of dark matter near
enough to cause clock differences would do to the earth? If anything.
Wouldn't dark energy do the same thing?


Isn't dark matter meant to be gravitationally attractive whereas dark
energy is repulsive? A bit like opposite sides of Alice's mushroom
(IIRC)...


Could be - and why it accounts for the universe expanding more rapidly
than what conventional physics (Newtonian) would account for. OTOH,
E=mc^2 means energy is no different than mass when it comes to
attraction (why light bends around massive objects).


--
Among Broad Outlines, conception is far more pleasurable
than “carrying [the children] to fruition.”
Sadly, “there’s a high infant mortality rate among
Broad Outlines—they often fall prey to Nonstarters.”
"Bestiary of Intelligence Writing" - CIA

 




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