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Originally posted by maythetruthbeknown
So it appears that they may (although not yet confirmed) of discovered a dark matter Galaxy just outside of our own
Here is a quote from the article.
"Chakrabarti, of the University of California, Berkeley, devised a technique similar to that used 160 years ago to predict the existence of Neptune, which was given away by the wobbles its gravity induced in Uranus's orbit.
Based on gravitational perturbations of gases on the fringes of our Milky Way galaxy, Chakrabarti came to her conclusion that there's a heretofore unknown dwarf galaxy about 260,000 light-years away"
Andromeda is 2.5 million light-years away ,so in comparison this is just next door to us
What, if true could lurk in this unseen Galaxy? It is thought to have some dim stars so the light should be able to be picked up now they know where to look.
The majority of our Universe is theorised to be dark matter so who knows what else lies out there. These really are interesting times we live in.
I know there is not a lot of information but hopefully more on this subject will be discovered ,thought I would share with you ATSers that are interested anyway. Any comments are welcome
Regardsedit on 15-1-2011 by maythetruthbeknown because: (no reason given)
Originally posted by Devino
reply to post by gringoboy
I don't think dark matter has anything to do with different dimensions. Dark matter is something that was invented to help explain the way galaxies spin and move.
Notice that galaxies have spiral arms. Material that orbits the center of these galaxies due only to gravity should follow the inverse square law. The outermost of these stars should rotate at a much slower rate then that of the inner material or stars closer to the middle (rate of rotation inversely squared by the distance). We see this in the orbital motions of the planets and moons in our solar system.
What we observe is galaxies that have well formed spiral arms. If the material in these galaxies are spinning due only to the force of gravity then we should not see any spirals arms. They should have been twisted up beyond recognition long ago due to the nature of their rotational motions. In order for galaxies to rotate like a rigid wheel, as one, the thought is that there must be more matter causing enough gravitational force to hold this stuff together. ergo the theory of dark matter.
Think of the planets in our solar system. If they acted like these galaxies then all of the planets would take the same time to make one orbit around the Sun. Mercury would take 365 days to make one orbit as well as Pluto.
The reason why dark matter is said to be invisible is simply because they cannot see it nor record it. Dark matter has not been detected in any direct way. Perhaps there is another reason why galaxies rotate like a rigid body which we do not understand yet, one that does not need some fictitious dark matter to explain.
edit on 1/15/2011 by Devino because: (no reason given)