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Looking into the past with a telescope
With the JWT, I have read that scientist will be able to see back
closer to the big bang than with any modern telescope; targeting IR. I understand that when we look at a DSO (or any object), that we are looking at the DSO the way it looked at some time(t) in the past. In this respect, we are looking at a snap shot of the past. But what exactly are the astronomers expecting to see? New galaxies not seen before due to their extreme red shift? |
#2
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Looking into the past with a telescope
cantseeboo wrote:
With the JWT, I have read that scientist will be able to see back closer to the big bang . . . . But what exactly are the astronomers expecting to see? New galaxies not seen before due to their extreme red shift? The formation of the first galaxies. - Canopus56 |
#3
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Looking into the past with a telescope
The formation of the first galaxies. - Canopus56 1) Do the astronomers have an idea of where to look, or, are they just going to perform random scanning of the sky? |
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Looking into the past with a telescope
cantseeboo wrote:
The formation of the first galaxies. - Canopus56 1) Do the astronomers have an idea of where to look, or, are they just going to perform random scanning of the sky? They surround us. But it would be a good idea to look somewhere there is little between us and those great distances. A window, of sorts, presumably away from Milky Way and large intervening clusters of galaxies. -- Greg Crinklaw Astronomical Software Developer Cloudcroft, New Mexico, USA (33N, 106W, 2700m) SkyTools: http://www.skyhound.com/cs.html Observing: http://www.skyhound.com/sh/skyhound.html Comets: http://www.skyhound.com/sh/comets.html To reply take out your eye |
#5
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Looking into the past with a telescope
Since the distribution of galaxies on the large scale is isotropic, ....
Where do astronomers think the Milky Way is *in the Universe*? Towards the center? Close to the edge? Any idea? Do astronomers know where the universal center is? I guess that's the same as asking where's the universe's center of gravity....Maybe not.... |
#6
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Looking into the past with a telescope
On Jan 25, 5:33 pm, "cantseeboo" wrote: With the JWT, I have read that scientist will be able to see back closer to the big bang than with any modern telescope; targeting IR. I understand that when we look at a DSO (or any object), that we are looking at the DSO the way it looked at some time(t) in the past. In this respect, we are looking at a snap shot of the past. But what exactly are the astronomers expecting to see? New galaxies not seen before due to their extreme red shift? Would you like to be the first to answer this question correctly. You know that our solar system is moving with the rest of the local stars around the Milky Way axis. If you look at an external galaxy,say the Whirlpool galaxy,what would you expect to happen after 1 million years ?.Remember the foreground stars of the Milky Way are orbiting the galactic axis therefore we are moving like a system on a giant carousel. The idea is to develop the feel for cyclical motions and how to use the illusion created by radiation having a finite speed just like Ole Roemer used the orbital cycles of the Earth and Jupiter to determine that light generates an illusion as we look into the celestial arena where all the great cycles exist. |
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Looking into the past with a telescope
On 26 Jan 2007 09:02:33 -0800, "cantseeboo"
wrote: Where do astronomers think the Milky Way is *in the Universe*? Towards the center? Close to the edge? Any idea? Every 3D point in the Universe is at the center. There is no edge. Do astronomers know where the universal center is? In three dimensions, there is no center. _________________________________________________ Chris L Peterson Cloudbait Observatory http://www.cloudbait.com |
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Looking into the past with a telescope
Would you like to be the first to answer this question correctly.
You know that our solar system is moving with the rest of the local stars around the Milky Way axis. If you look at an external galaxy,say the Whirlpool galaxy,what would you expect to happen after 1 million years ?.Remember the foreground stars of the Milky Way are orbiting the galactic axis therefore we are moving like a system on a giant carousel. That seems true for indicating the direction to intergalaxy objects with respect to intragalaxy objects, but is that true for indicating direction of intergalaxy objects with respect to other intergalaxy objects? Don't listen to me, I'm tired as old hell from staying up late putting together the NEW XT-12 Intelliscope.... Yeee doggie! Errol pasnola Errol pasnola |
#9
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Looking into the past with a telescope
cantseeboo wrote:
Since the distribution of galaxies on the large scale is isotropic, .... Where do astronomers think the Milky Way is *in the Universe*? Towards the center? Close to the edge? Any idea? Do astronomers know where the universal center is? I guess that's the same as asking where's the universe's center of gravity....Maybe not.... The Universe has no true center. The frames of reference we are used to on the earth are only illusions. In the universe at large no two observers (people) can be expected to keep the same time much less agree where to measure everything from. Imagine that you live on the earth but think it is flat. The flatness of the earth is an illusion. For a person who sees the earth in terms of this illusion, where then is the center of the earth? If you put a marker into the ground and start walking in a straight line you will eventually come back to the marker... So where is the edge of the earth? Where is the center? Is it infinite? The universe is like that; it isn't that the universe is weird, it's that we perceive it in a simplistic way--just like the person who perceives the earth as flat. In a very real sense the position of each observer is the center of the universe. Relativity teaches us that everything is relative--which means there are no absolutes. A universal center is an absolute. Every observer sees the universe from their own perspective, both in space and time. As we cling to this tiny planet the differences in perspective are small, so we ignore them. Not so with the universe at large! So from our point of view on this planet we are the only center that can be defined with any meaning; the universe appears around us as if we are at its center. Greg -- Greg Crinklaw Astronomical Software Developer Cloudcroft, New Mexico, USA (33N, 106W, 2700m) SkyTools: http://www.skyhound.com/cs.html Observing: http://www.skyhound.com/sh/skyhound.html Comets: http://www.skyhound.com/sh/comets.html To reply take out your eye |
#10
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Looking into the past with a telescope
Starboard (Errol) e-mailed me the following replies. Said that the
board would not accept his post for some reason.. I'm posting for him... cantseeboo........................................ .................................................. . I guess that's the same as asking where's the universe's center of gravity.... The Universe has no true center. The frames of reference we are used to on the earth are only illusions. In the universe at large no two observers (people) can be expected to keep the same time much less agree where to measure everything from. When the universe came into being, it began expanding into, what I first heard referred to by Prof. Hawking, nothingness. But suppose someone viewed said expanse from that area of nothingness. Could he say "I saw the universe expand away from some point in the universe's interior."? Would it be the same as asking "if there were a big crunch, to what point in the universe would all matter crunch to?" Imagine that you live on the earth but think it is flat. The flatness of the earth is an illusion. For a person who sees the earth in terms of this illusion, where then is the center of the earth? Where is the center? Seems obvious, but don't you think difficulties arise when one states that the flatness expanded from a single point in the past? In a very real sense the position of each observer is the center of the universe. Relativity teaches us that everything is relative--which means there are no absolutes. Agreed that relativity does teach us that there is no preferred place from which to take a measurement, however, isn't it also reasonable to assume that the universe did expand away from some point in the universe's interior in the distant past? Errol pasnola |
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