HST and 'dark matter' |
HST and 'dark matter' |
Guest_PhilCo126_* |
May 11 2007, 05:13 PM
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Guests |
ASA Updates Plans for Hubble 'Ring Of Dark Matter' Briefing
GREENBELT, Md. - NASA will hold a media teleconference at 1 p.m. EDT on May 15 to discuss the strongest evidence to date that dark matter exists. This evidence was found in a ghostly ring of dark matter in the cluster CL0024+17, discovered using NASA's Hubble Space Telescope. The ring is the first detection of dark matter with a unique structure different from the distribution of both the galaxies and the hot gas in the cluster. The discovery will be featured in the June 20 issue of the Astrophysical Journal. |
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Mar 11 2010, 07:30 PM
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Member Group: Members Posts: 723 Joined: 13-June 04 Member No.: 82 |
The following is just my own understanding of what this theory of gravity is saying.
It looks to me that it says that the only truly fundamental 'things' in our universe are the holographic screens that separate and define every point in (two-dimensional) spacetime, and the information / entropy associated with each such screen (plus whatever micro-level theory actually coordinates the individual points and screens, i.e. string theory or its big brother M-theory, loop quantum qravity, twistor theory, etc.), everything else emerging from that. (Actually, the current word is that this theory is incompatible with string theory or M-theory, since it goes directly from 2D spacetime to our observed spacetime with no intervening extra dimensions. This is no surprise to me, since I have always been sceptical of string theory -- it must have the highest ratio of effort invested to usable results, of any physical theory ever.) I have heard nothing about the strong and weak nuclear forces so far, but gravity, and very possibly electromagnetism, are already being described as derived forces, so I would not be surprised if the other two 'fundamental' forces are as well, in the full theory. |
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