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#1
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Gravitational Lensing ???
OK we know the gravitational influence of one galaxy acts like a lens to
create a magnified picture of a far more distant galaxy located behind it. With all those billions of galaxies out there can we say that every photon has been lens if it started out 13 billion LY from us? How good is gravity lens focas? How much does this gravity lensing alter the photon's wave length. When I read about gravity magnified light it sounds like a good thing. Does it have any negative features? Like making an image blurry? Bert |
#2
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"G=EMC^2 Glazier" wrote OK we know the gravitational influence of one galaxy acts like a lens to create a magnified picture of a far more distant galaxy located behind it. With all those billions of galaxies out there can we say that every photon has been lens if it started out 13 billion LY from us? How good is gravity lens focas? How much does this gravity lensing alter the photon's wave length. When I read about gravity magnified light it sounds like a good thing. Does it have any negative features? Like making an image blurry? Bert Here's a picture through a gravitational lense! http://whyfiles.org/052einstein/grav_lens.html "that's so distant we couldn't see it any other way" Herc |
#3
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Hi Herc Nice site. Gravity lensing had to be an Einstien
prediction,because it fits so well with his theories on curved space. Hard to argue against the thoughts of the worlds greatest genius. Still it is an exercise in creative thinking. Bert |
#4
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Just a thought on the way light is focus(come to a point) when a large
galaxy is in front of a galaxy in back of it and in our line of view. I think(not sure) the light from from the further away galaxy does not shine through the galaxy and have its light focus,but goes by the perimeter of the galaxy and the light bends in by gravity and it gets to the Earth as concentrated point.(More photons in a smaller area) Think of it as a light cone pointed in our direction. Is this the way it is? This fits well with my "Spin is in" theory as how gravity attraction works. Bert PS Since the light can be blurry can todays computers help in focasing this light? |
#5
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What if from our point of view we are seeing the universe's horizon in
our line of view. The universe could be flat as our Milky Way galaxy Seems the only way we know our galaxy is as flat as a fried egg is really comparing it to other spiral galaxies(yes?) Now what if the edge of the universe is revolving at close to "c" and gives back photons that are redden so much that we interpret this to mean they are moving away from us. Best to think in every direction. Ops just looked up this is going into "gravity Lensing" What the hell. Bert Ps They are putting my thoughts to close together |
#6
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"G=EMC^2 Glazier" wrote in message ... What if from our point of view we are seeing the universe's horizon in our line of view. The universe could be flat as our Milky Way galaxy Seems the only way we know our galaxy is as flat as a fried egg is really comparing it to other spiral galaxies(yes?) No, optically we can see the milky way that defines a narrow plane. In radio, we can detect the HII regions that define at least 3 bands corresponding to the spiral arms. Using Globular clusters (and radio) we can determine that there is a thicker central hub region. Certainly we have used external spiral galaxies to help us interpret our observations, but we're not dependent on comparisons to interpret what we can see. On the other hand, we can see that the universe is broadly the same in all 3 dimensions. Now what if the edge of the universe is revolving at close to "c" and gives back photons that are redden so much that we interpret this to mean they are moving away from us. There is no firm evidence for a gross rotation of the universe, and I understand that the SR equations for a rotating system gives an appearance that the radius of the system is contracted. However, there is no evidence to support such a suggestion. On the other hand, feel free to work out what the observable effects would be. Best to think in every direction. Ops just looked up this is going into "gravity Lensing" What the hell. Bert Ps They are putting my thoughts to close together |
#7
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OG What my thoughts were that the universe can be flat like spirral
galaxies,but the universe even if it is thin is to thick to measure. Seems we have trouble seeing across our galaxy(dust in our line of view) than seeing up or down,and away from the far outer edge.of the Milky Way I see the universe so very big that it looks the same in every direction,and still be the shape of a fried egg. Bert |
#8
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"G=EMC^2 Glazier" wrote in message ... OG What my thoughts were that the universe can be flat like spirral galaxies,but the universe even if it is thin is to thick to measure. Seems we have trouble seeing across our galaxy(dust in our line of view) than seeing up or down,and away from the far outer edge.of the Milky Way I see the universe so very big that it looks the same in every direction,and still be the shape of a fried egg. Bert Why? |
#9
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Why not??/ Bert
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#10
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"G=EMC^2 Glazier" wrote in message ... Why not??/ Bert You're saying the universe as far as we can see is the same in all directions, but out of sight it is flattened. The CMBR is more or less uniform in all directions and WMAP doesn't show any evidence for this flattening. Are you working on this to work out any consequences that astronomers could look for? |
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