Dark Matter Mystery Deepens in Cosmic "Train Wreck" »
Posted by: RickyDawkins 1 year agoNASA's Chandra X-ray Observatory and optical telescopes revealed a dark matter core that was mostly devoid of galaxies, which may pose problems for current theories of dark matter behavior. In addition to the dark matter core, a corresponding "light region" containing a group of galaxies with little or no dark matter was also detected.
Read Full Story at chandra.harvard.edu
Join the Discussion 
+ Add Comment
Comments So Far: 52
-
-
-
0%
RickyDawkins12 months ago
Probably need to head to NYC...
http://www.amnh.org/rose/hayden-spacetheater.html
When the Digital Galaxy software is booted, the Hayden Planetarium's supercomputer generates a three dimensional map of the galaxy that is so realistic that the dome itself seems to disappear. "Cosmic Collisions" will also show the creation of our Moon some five billion years ago when a wandering planetoid struck Earth; the violent meeting of two stars at the edge of the galaxy; and the future collision of our Milky Way galaxy with our closest neighbor, the Andromeda spiral galaxy, a cosmic crash that will produce a new giant elliptical galaxy billions of years from now.
Audiences will feel the ground shake beneath them as they experience a thrilling recreation of the meteorite impact that hastened the end of the Age of Dinosaurs 65 million years ago and cleared the way for mammals like us to thrive.
Reply
-
-
-
0%
sumptuousdigs1 year ago
Ricky Dee. . What's behind door number three? The recent posts regarding dark matter, neutron stars, and giant voids has got me thinking...that's all, just thinking. As all of your posts, this is enjoyable and like I said, thought provoking.
Reply -
-
0%
humemacdonald1 year ago
UVic is doing some really great work in this area, here is a link:
http://www.uvic.ca/research/computational.html
Reply-
0%
humemacdonald12 months ago
Computational Modelling & Information Processing
We're unravelling the most complex mysteries of the universe...
Quite a few of the researches are from UVic so I thought the link was fitting. Here is an excerpt:
Some of the really big questions about our universe can only be answered with the help of enormously powerful computers.
UVic researchers are leading the way in the use of advanced computer technology to explore massively complex systems (including climate change, galactic evolution and high-energy collisions of subatomic particles). They're also building the world's largest international computer grid to provide computational power far greater than that of current supercomputers.
Reply
-
-
-
-
0%
DarkWizard1 year ago
I always find it interesting when new discoveries are made. It shows how little we really know about the vastness of outer-space or of the true scope of our inner-space.
The possible rethinking of physics as we know it. That is mind-boggling in itself.
Thanks for the post RD.
Reply -
0%
Mutainia1 year ago
Strange. Once you start believing that we have spiral galaxies due to a perfect balance of dark matter, then you have something like this! And, on TOP of if, just a week ago, we learn that a big portion of the universe is missing that shouldn't be missing, flying in the face of the Big Bang theory. I mean, WHAT is God trying to DO to us, make us believe in the "Twilight Zone"?! :)
Reply -
0%
DarkWizard1 year ago
Mutainia,
That's funny. I just used the "Twilight Zone" reference in another post. Probably about the same time you wrote your post as I had just posted here, left, and came back. What are the chances of that happening in the universe? You musta been peeping through a cyber-wormhole at me!
Reply -
0%
Mutainia1 year ago
Hmm. I think I can almost smell the smoke of a cigarette over this one. :)
Reply -
0%
Obaku1 year ago
Dark matter: We don't know what it is, we can't 'see' it in any wavelength, and it makes up 98% of the matter in the universe.
Reply -
0%
RickyDawkins12 months ago
Much of the evidence for dark matter comes from the study of the motions of galaxies. Many of these appear to be fairly uniform, the total kinetic energy should be half the total gravitational binding energy of the galaxies.
http://en.wikipedia.org/wiki/Image:Abell.lensin...
The total kinetic energy is found to be much greater: in particular, assuming the gravitational mass is due to only the visible matter of the galaxy, stars far from the center of galaxies have much higher velocities than predicted. Galactic rotation curves, which illustrate the velocity of rotation versus the distance from the galactic center, cannot be explained by only the visible matter.
http://en.wikipedia.org/wiki/Image:060821_darkm...
Galaxies show signs of being composed largely of a roughly spherically symmetric, centrally concentrated halo of dark matter with the visible matter concentrated in a disc at the center.
http://en.wikipedia.org/wiki/Dark_matter
Reply -
0%
m-simon12 months ago
That is not the only mystery. A reputable scientist may have discovered a gravity generator:
http://powerandcontrol.blogspot.com/2007/08/gra...
Reply -
0%
BruiserTom12 months ago
OK. Here's my theory (remember you heard it here first, folks. Or maybe not. I'm not all that well read on the subject):
Forget the Big Bang. It didn't happen. It's just an illusion, just as the Ptolemaic system was based on an illusion, although they kept trying for centuries to pound new discoveries into it to make them fit the theory.
Dark matter is new matter coming into existence in the empty voids of space. Call it proto-matter, if you like. Non-existence provokes existence. New matter creates new space, or vice versa, or simply in tandem. (I need more data.) As new space is created it causes the expansion of the universe.
The universe could be infinite and eternal (although it doesn't have to be). I know there are problems with an infinite universe, but I think they can be worked out. Just because the universe as a whole is eternal, it doesn't mean that local parts of it have to be, thus accounting for the apparent age of 14 billion years.
Reply-
0%
MarkeD12 months ago
This was the orginal theory before the Big Bang gained acceptance. Hoyle in particular championed the "steady state" theory of the universe, constanlty creating matter. (Which IIRC wasn't much, about 1 atom/year/lightyear cube)
For a theory other than Big bang to gain acceptance, it needs to explain why everything far away from us is flying away at an increasing rate (Expanding) and why there is a cooling warm glow everywhere in the universe (Cosmic Microwave background) extrapolate both of these backwards you get a small hot universe ie. Big Bang.
Reply
-
-
-
0%
BruiserTom12 months ago
I don't venture too far into string theory. I tend to get tangled up.
Reply -
0%
BruiserTom12 months ago
Besides... they aren't strings.
They are the hairs of God's beard and shouldn't be messed with.
Reply
-
-
0%
Rhialto12 months ago
What happens to the photon when it interacts with dark matter, since it is not reflected. Completely absorbed?
Reply -
0%
BruiserTom12 months ago
Dark matter produces gravity, which (I think) is the only reason we suspect that it exists. Gravity attracts light although weakly. When light passes by a large gravity field it is bent towards it producing a lensing effect.
What happens if a photon actually hits a piece of dark matter? I don't think we know. It could possibly pass right through with no interaction whatsoever.
Reply-
0%
jimdoze12 months ago
Gravity does not "attract" light. Gravity is what appears to us as an attractive "force", but is simply the curvature of space-time. The greater the mass of an object, the greater the curvature it produces in the space-time continuum. Sufficiently massive objects curve the space-time continuum to the point that light cannot escape... ergo "black holes." When light passes near massive objects in space it simply follows the space-time continuum, which is bent in that vicinity. That bending is analogous to (but not the same as) the refraction of light by a prism. By measuring the relative "bend" of the light, the mass of that object can be determined.
Could it be that the big bang was simply the inverse (as we observe it) of a massive collapse of matter into a "black hole" in another universe? Could it be that "dark matter" is the evidence of other universes, or parts thereof, collapsing into ours?
Reply-
0%
humemacdonald12 months ago
jimdoze- implosion vs. explosion,good hypothesis, that's the stuff of great SCI-FI too!!
Ok you get to work on that and report back ASAP, we will all just hang around for encouragement-lol.
Reply -
0%
BruiserTom12 months ago
Jimdoze,
I completely agree with your description of gravity. I simply used the term "attract" for brevity. It's good enough for government work (except for some of the NASA stuff).
Newton's F=MA also is not entirely correct, but it serves very well for most government work.
The sun doesn't really "rise" either, but I'd hate to have to say, "What a beautiful ...uh... well, you see...the earth is turning on it's axis to a point where....". It just ain't poetical.
Reply
-
-
-
-
0%
truthiness12 months ago
the really funny part is, you have as much chance of proving that theory right or wrong as the theory of dark matter.
Reply
-
-
0%
Mutainia12 months ago
Ok, Dark Matter isn't the Atheist's NAME for God, it's ONE of the names of God, like "time and chance" are. Oh, and Pele WAS a god, a miracle man, if you ask me.
Reply
Submitted By:
RickyDawkins
Pascal's Wager (God is a safe bet)
"If you believe in God and turn out to be incorrect, you have lost nothing--but if you ...
Related Articles:
Why not submit a story?
Also Propping This Article
pawfoots- Helixbuilder
- sn99cobra
- TGrass3001
stephen-johnson
DarkWizard
tehranchik
quicksilver0602
BruiserTom
david_nwpa
Groups Watching This
No groups are watching this story. Why not share it with your group?
