jeff Mitchel Posted November 4, 2008 Share Posted November 4, 2008 Since the 1980's we have known that the local group of galaxies is being drawn toward the area of the Great Attractor and Shapley Supercluster. I can see only two methods of attraction. (1) Orbital; in which case we should be able to detect many blue shift galaxies on inside or outside orbits. (2) Straight line attraction: in which case we should be able to detect blue shift galaxies on the other side heading into the area of attraction. Link to comment Share on other sites More sharing options...
D H Posted November 4, 2008 Share Posted November 4, 2008 This is a straw man, Jeff. You are intentionally omitting the Hubble Flow. The motion toward the Great Attractor is small compared to the motion induced by the expansion of space. We would only see blue shifted galaxies if the Great Attractor dominated the expansion of space. Link to comment Share on other sites More sharing options...
snp.gupta Posted December 18, 2008 Share Posted December 18, 2008 This is a straw man, Jeff. You are intentionally omitting the Hubble Flow. The motion toward the Great Attractor is small compared to the motion induced by the expansion of space. We would only see blue shifted galaxies if the Great Attractor dominated the expansion of space. Do you mean to say, Andromeda is now no more a Blue shifted galaxy? Can you please explain…????.... Link to comment Share on other sites More sharing options...
D H Posted December 18, 2008 Share Posted December 18, 2008 snp.gupta, jeff was not talking about the local group. Andromeda is a only 2.5 million light years away, very small compared to the distances to which jeff was alluding. He was talking about galaxies on the other side of the Great Attractor. The Great Attractor is 250 million light years away, so he was referring to galaxies 500 million light years away. At these distances the Hubble flow overwhelms any local motion and overwhelms gravity. Thread moved to pseudoscience. Link to comment Share on other sites More sharing options...
snp.gupta Posted December 18, 2008 Share Posted December 18, 2008 snp.gupta, jeff was not talking about the local group. Andromeda is a only 2.5 million light years away, very small compared to the distances to which jeff was alluding. He was talking about galaxies on the other side of the Great Attractor. The Great Attractor is 250 million light years away, so he was referring to galaxies 500 million light years away. At these distances the Hubble flow overwhelms any local motion and overwhelms gravity. Thread moved to pseudoscience. Thank you sir, There are blue shifted Galaxies there also, Can there be any catalog giving the details... regards:-) Link to comment Share on other sites More sharing options...
D H Posted December 19, 2008 Share Posted December 19, 2008 There are blue shifted Galaxies there also Almost certainly not, and we certainly don't see any. The Hubble flow at 250 million light years (the distance to the Great Attractor) is over 5 thousand kilometers/second, which is nearly an order of magnitude greater than the peculiar velocities toward the Great Attractor. In other words, at the distances to which jeff Mitchel was referring, the Hubble flow dominates peculiar motion. All of the galaxies "on the other side" of the Great Attractor are red shifted. 2 Link to comment Share on other sites More sharing options...
Pangloss Posted December 19, 2008 Share Posted December 19, 2008 Thanks for making lemonade out of lemons, DH. There were several points in your replies that I hadn't heard before and found really interesting. Link to comment Share on other sites More sharing options...
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