Search found 298 matches

by Martin
Fri Oct 23, 2009 2:46 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Do we know what Dark Matter/Energy is?
Replies: 101
Views: 5487

Re: Do we know what Dark Matter/Energy is?

Interesting terms,.."refine and improve upon". Please note: I do not propose that a complete modification is required or that any specific modification will completely explain all observations. On the other hand, I strongly suspect that we will continue to "refine and improve upon&quo...
by Martin
Fri Oct 23, 2009 4:42 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Do we know what Dark Matter/Energy is?
Replies: 101
Views: 5487

Re: Do we know what Dark Matter/Energy is?

canuck100 wrote: Synopsis: Dark Energy Known? 70% of the universe is dark energy it is responsible for the acceleration of the expansion of the universe. Three kinds of theories attempt to explain it: 1. Einstein’s cosmological constant – i.e. vacuum energy, a property of space itself 2. a strange e...
by Martin
Thu Jun 25, 2009 3:27 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Water on Mercury
Replies: 8
Views: 1137

Re: Water on Mercury

We must collect a sample of this Mercury Ice.
by Martin
Thu Dec 18, 2008 11:11 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Speed of Light not Constant?
Replies: 28
Views: 2876

Re: Speed of Light not Constant?

I understand Chris. Thank you for your reversal and partial agreement. However, most scientific adventures are difficult and dependant upon luck. Some were near impossible with major odds stacked against them. But the quest for knowledge must prevail. :idea:
by Martin
Thu Dec 18, 2008 8:14 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Speed of Light not Constant?
Replies: 28
Views: 2876

Re: Speed of Light not Constant?

I think we are currently detecting about four GRB's per month? Chris, your reply appears to indicate that my original statement could be accurate? :shock:
by Martin
Thu Dec 18, 2008 1:34 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Speed of Light not Constant?
Replies: 28
Views: 2876

Re: Speed of Light not Constant?

I was thinking along the lines that GRB's are the most luminous electromagnetic events occurring in the universe..... The search continues for that perfect lens, with many multiply-imaged arcs. Gravitational lens, Wikipedia Perhaps I am confusing this process in my mind though. The light source is n...
by Martin
Tue Dec 16, 2008 11:28 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Speed of Light not Constant?
Replies: 28
Views: 2876

Re: Speed of Light not Constant?

It seems to me that observing GRB's in greater detail would eventually lead to more evidence for or against Dark Matter.
by Martin
Fri Nov 14, 2008 9:32 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Re: Could Dark Matter Possibly Be . . .

Chris, Thank you for your timely response. I stand corrected. It appears that observation does support a metric expansion as you kindly stated. Very interesting. Back to the DM. As you already know, QM has identified the 3 messenger particles responsible for 3 of the 4 forces. Is it reasonable to th...
by Martin
Fri Nov 14, 2008 7:34 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Re: Could Dark Matter Possibly Be . . .

I think it should be mentioned that it is only a theory that empty space is expanding. Observations clearly reveal that matter is moving and creating greater distances from other matter. However, the fabric of space itself -there is no direct evidence of it's expansion and this assumption is based m...
by Martin
Sat Nov 08, 2008 5:52 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Re: Could Dark Matter Possibly Be . . .

Wow - I wasn't being sarcastic. Are there any theories on the origin of DM? Such as there is on Hydrogen and Helium. But I suppose we need to know what it is 1st, eh?
by Martin
Thu Nov 06, 2008 1:41 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Re: Could Dark Matter Possibly Be . . .

Chris wrote: I don't understand your point about technological barriers. From a theoretical standpoint, DM is on stronger ground than DE (again, I don't know why these get discussed together, when there is absolutely nothing in common between them). Of course, their theory is still being developed, ...
by Martin
Wed Nov 05, 2008 1:12 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Re: Could Dark Matter Possibly Be . . .

Chris wrote: Gravitons are completely hypothetical, and not even required by most theories of gravity. The physical existence of dimensions beyond the four we have evidence for is hypothetical and has no supporting observations. I noticed you did not attempt to answer my direct question but then aga...
by Martin
Tue Nov 04, 2008 11:18 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Re: Could Dark Matter Possibly Be . . .

Could DM be a reaction/effect of gravitrons entering and passing thru our spacial dimension?
by Martin
Tue Nov 04, 2008 5:27 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Re: Could Dark Matter Possibly Be . . .

Chris, I have been looking but I am unable to locate info on the M-Theory as it relates to DM & DE. Does Quantum Mechanics support these theories too?
by Martin
Tue Oct 28, 2008 2:15 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Chris, Variable Gravity. What are your thoughts on this? Since Newton's laws had to be modified for the extremely small ...isn't it likely that it may need to be modified for the extremely large? Wasn't DM & DE born from the failure of computers to accurately simulate the formation and motion of...
by Martin
Tue Oct 21, 2008 4:48 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Chris wrote:
Neutrinos have been considered a candidate for dark matter, although that theory is currently not too well regarded.
Why is this not well regarded any longer?
by Martin
Tue Oct 14, 2008 6:37 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Qev wrote: Just thought I'd point out, leptons, photons, W and Z bosons, and neutrinos are all non-baryonic matter. I do not think this is correct nor do I think it would be a good example. I do think that when I first suggested that we may have gravity wrong once again -goes unchallenged (with a pa...
by Martin
Wed Oct 08, 2008 11:10 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

Chris wrote: There is really nothing to make me think we don't have a good, solid understanding of gravity. When was the last time "non-baryonic particles" were needed to explain an observed phenomenon? Has any non-baryonic matter ever been observed else where in our universe? And our curr...
by Martin
Tue Oct 07, 2008 10:19 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

To not have it completely correct or completely understood can be phrased as "wrong", since it fails to fully explain itself in its entirety. I believe it is highly more probable than you are suggesting it is. Just because we can make accurate predictions does not automatically imply that ...
by Martin
Mon Oct 06, 2008 12:35 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

:arrow: :
by Martin
Sat Oct 04, 2008 3:47 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27804

There is also a good chance that we have gravity wrong once again and there is no "unkown matter". :oops:
by Martin
Thu Sep 11, 2008 4:31 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Active Galaxy NGC 1275 (APOD 22 Aug 2008)
Replies: 20
Views: 7205

Thx for pointing that movie link out -I missed it.

There is a good reason why plagiarism is not a criminal act. This would be one example.

I thought I did include the source Wikipedia (oops). As far as, being unethical -that is relative.
by Martin
Wed Sep 10, 2008 4:45 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Active Galaxy NGC 1275 (APOD 22 Aug 2008)
Replies: 20
Views: 7205

I agree it sounds like a movie. However, some ideas as ridiculous as they sound can become reality at a later date. So mock accordingly I just wanted Orin to realize that there could be alternatives and one may not have to find a way to reverse the entire observable universe to accomplish time trave...
by Martin
Fri Sep 05, 2008 10:21 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Active Galaxy NGC 1275 (APOD 22 Aug 2008)
Replies: 20
Views: 7205

Orin wrote: One of the reasons i don't believe we can go backward in time. To do so; the movement of the universe would have to be reversed. If your at a certain place at a certen time; everything would have to be at that point. Unless the other unknown dimentions can allow this. Ronald L. Mallett, ...