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Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Dreaded Anomaly Send a noteboard - 30/04/2011 08:56:35 PM
Perhaps I misunderstood then. I thought the proposal was that the Bullet Clusters dark matter passed through the other cluster without collision and was thus farther to the other side of it than the Bullet Clusters other matter, but that the x-ray emitting gases did collide because they were normal matter subject to electromagnetism (as evidenced by the fact they're emitting x-rays). The x-ray emitting gases were significant, as I understood it, because the gravitational lensing associated with the Bullet Cluster is NOT strongest where they are (despite the fact they appear to be the largest concentration of normal matter).


Yes, that's the explanation of the evidence. I'm not sure what that has do to with the objection you made.

Singly or in combination; both seem possible, meaning there are no less than three potential alternatives that don't require positing neutrinos are just one tiny part of a whole new class of matter.


They seem possible because you have an overly-limited view of the evidence.

Also, neutrinos and whatever new particle(s) are found would not necessarily be in the same "class." They would be similar in that they wouldn't interact electromagnetically, but neutrinos are not the only particle for which that is true: see gluons, Z bosons. For that matter, there are also photons, which are carriers for the electromagnetic force; they mediate EM interactions, but do not have such interactions themselves, as they don't have any electric charge.

The second sentence is the reason for the perception in the first. For my part, I don't think anyone overeager to tell a story unsupported by the evidence, but think many overeager to tell a story that allows few if any tests but radically alters the scientific landscape, in the hopes tests will subsequently become possible and supporting evidence found. The problem with that is it encourages the idea that when such a test is found but the evidence is not the problem must be the test rather than the theory. I mentioned James Bockris down below; it was only when I looked up his name to cite for Texas A&Ms role in the cold fusion hoax that I found he's since claimed to be transmuting elements, but whether it's the Philosophers Stone or cold fusion, if you keep looking and looking for something of which you find not even a hint, rather than not looking hard enough, the reason may be that it's simply not there.


But, in the case you describe, there would be other scientists just as eager to change the landscape in a different direction, by proving the first group wrong.

We have more than just hints that dark matter exists and is exotic. We know from the current evidence that direct detection of it will be hard to do, so the fact that we haven't seen any results yet isn't inconsistent or a warning sign. If we thought it was going to be easy and then didn't come up with anything, that would be a different story.

I haven't taken any classes on those specific subjects rather than general physics, no, and acknowledge the large possibility I'm simply not well enough informed to know all the ways my objections have been addressed. However, my concern is that a lot of people who should know better are too invested in dark matter to look for explanations, in the abstract, rather than simply proof of the dark matter they KNOW is there. They have a word for that, but it isn't "science".


But this concern is based on an incomplete understanding of the evidence (and what still sound a lot like impressions derived from news media sensationalism to me). The idea that some scientists get "too invested" may certainly be true in general, but that is not a valid reason to aspersions on the entire enterprise, because there are always going to be other scientists going in other directions, and in this specific case, the evidence simply isn't nearly as flimsy as you think it is.
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Exciting video about the universe Camilla - 28/04/2011 10:14:55 AM 1170 Views
Cool, and true *NM* Stephen - 28/04/2011 11:46:29 AM 356 Views
I still think dark matter's just non-luminous matter without a convenient light source to reflect. Joel - 28/04/2011 10:34:21 PM 881 Views
We've just about ruled out the idea that dark matter is just non-luminous "ordinary" matter. Dreaded Anomaly - 28/04/2011 11:44:34 PM 819 Views
I'm aware of the Bullet Cluster, though admittedly not much more than that. Joel - 29/04/2011 01:52:49 AM 759 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Dreaded Anomaly - 29/04/2011 02:56:32 AM 859 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Joel - 30/04/2011 05:02:49 PM 792 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Dreaded Anomaly - 30/04/2011 08:56:35 PM 687 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Joel - 02/05/2011 01:28:30 AM 721 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Dreaded Anomaly - 04/05/2011 04:18:18 AM 821 Views
There's such a thing as knowing when you're licked, and I believe I am. Joel - 07/05/2011 02:04:53 AM 898 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Dreaded Anomaly - 09/05/2011 11:28:48 PM 742 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Joel - 14/05/2011 05:36:45 AM 694 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Dreaded Anomaly - 17/05/2011 02:09:40 AM 774 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Joel - 19/05/2011 04:55:21 AM 700 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Dreaded Anomaly - 24/05/2011 09:32:27 PM 772 Views
The Pati-Salam model was the one I had in mind. Joel - 24/05/2011 10:34:04 PM 713 Views
Re: The Pati-Salam model was the one I had in mind. Dreaded Anomaly - 24/05/2011 11:08:01 PM 931 Views
Re: The Pati-Salam model was the one I had in mind. Joel - 25/05/2011 01:27:10 AM 740 Views
Re: The Pati-Salam model was the one I had in mind. Dreaded Anomaly - 31/05/2011 09:16:18 AM 808 Views
Apologies for the delay; internet's been spotty and I've been busy lately. Joel - 10/06/2011 12:09:04 AM 1059 Views
Re: Apologies for the delay; internet's been spotty and I've been busy lately. Dreaded Anomaly - 14/06/2011 03:38:18 AM 1056 Views
Also, re: lensing from ordinary matter: Dreaded Anomaly - 29/04/2011 05:18:47 AM 758 Views
This seems like another example of what confuses the issue. Joel - 30/04/2011 05:25:04 PM 878 Views
Re: This seems like another example of what confuses the issue. Dreaded Anomaly - 30/04/2011 08:56:40 PM 843 Views
That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 02/05/2011 01:29:03 AM 842 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 04/05/2011 04:18:24 AM 805 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 07/05/2011 02:05:02 AM 974 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 09/05/2011 11:29:36 PM 744 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 14/05/2011 05:35:56 AM 1032 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 17/05/2011 02:09:55 AM 645 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 19/05/2011 02:47:25 AM 989 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 24/05/2011 09:46:30 PM 768 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 25/05/2011 12:20:10 AM 1062 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 31/05/2011 09:16:22 AM 870 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 10/06/2011 12:04:06 AM 1110 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 14/06/2011 03:38:12 AM 881 Views
Re: I still think... (apparently, there is a 100 character limit on subjects, and yours was 99) Tor - 28/04/2011 11:57:15 PM 1060 Views
Seems to happen to me a lot; sorry. Joel - 29/04/2011 12:56:14 AM 738 Views
None of this reflects on the actual facts of dark matter. Dreaded Anomaly - 29/04/2011 01:32:52 AM 735 Views
I concede my grasp (or grope) is a somewhat superficial laymans, yes. Joel - 30/04/2011 04:30:28 PM 863 Views
Re: I concede my grasp (or grope) is a somewhat superficial laymans, yes. Dreaded Anomaly - 30/04/2011 08:56:44 PM 685 Views
Re: I concede my grasp (or grope) is a somewhat superficial laymans, yes. Joel - 02/05/2011 01:28:58 AM 1214 Views
Re: I concede my grasp (or grope) is a somewhat superficial laymans, yes. Dreaded Anomaly - 04/05/2011 04:18:27 AM 727 Views
I don't object to changing my mind, but can take more convincing than I really should. Joel - 07/05/2011 02:05:09 AM 937 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 09/05/2011 11:32:17 PM 851 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 14/05/2011 05:36:24 AM 1033 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 17/05/2011 02:10:03 AM 760 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 19/05/2011 04:33:06 AM 1017 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 24/05/2011 09:59:38 PM 760 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 24/05/2011 11:19:43 PM 715 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 24/05/2011 11:33:58 PM 676 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 25/05/2011 12:55:36 AM 777 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 31/05/2011 09:16:24 AM 723 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 10/06/2011 12:09:13 AM 897 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 14/06/2011 03:38:05 AM 859 Views
Might help if you clarified where your skepticism is at Isaac - 29/04/2011 02:32:07 AM 702 Views
Potentially either, or a combination of the two. Joel - 30/04/2011 02:36:50 PM 773 Views
It's hard to discuss without knowing your objections a bit more clearly Isaac - 30/04/2011 04:58:03 PM 684 Views
My primary objection is that alternatives to dark matter seem to have been ruled out prematurely. Joel - 02/05/2011 01:29:14 AM 824 Views
Well, they weren't, not really sure how else to put that Isaac - 10/05/2011 03:19:57 AM 877 Views
Alright then, objection withdrawn (cautious skepticism intact). Joel - 14/05/2011 05:34:17 AM 986 Views
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