Dark matter/Dark Energy

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Message 1809162 - Posted: 14 Aug 2016, 22:28:37 UTC - in response to Message 1805920.  

NASA's Fermi Mission Expands its Search for Dark Matter

Dark matter, the mysterious substance that constitutes most of the material universe, remains as elusive as ever. Although experiments on the ground and in space have yet to find a trace of dark matter, the results are helping scientists rule out some of the many theoretical possibilities. Three studies published earlier this year, using six or more years of data from NASA's Fermi Gamma-ray Space Telescope, have broadened the mission's dark matter hunt using some novel approaches.

http://www.nasa.gov/feature/goddard/2016/nasas-fermi-mission-expands-its-search-for-dark-matter

The universe has hidden the dark matter. Or, it never existed.
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Message 1809174 - Posted: 14 Aug 2016, 23:20:46 UTC - in response to Message 1809162.  
Last modified: 14 Aug 2016, 23:21:47 UTC

Perhaps some studies need to be funded to explore the reasons that we state that there is "Dark Matter" at all. There well may be but why do we say so and what are other explanations for what we think that we see.
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Message 1809199 - Posted: 15 Aug 2016, 2:34:21 UTC
Last modified: 15 Aug 2016, 2:39:39 UTC




Before I finish off.

Is this supposed to be about wonders of nature, or rather forces of nature instead?

Is it possible to see the face of God, rather than that of the Devil by looking at such a picture?

Does it tell anyting about creation in the same way as perhaps a couple of other things could do?

When it comes to the subject of the thread, I will look it up and get back at it later on.

The link became too long and the picture probably gets too large here.

In fact it does not take the picture this time.
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Message 1809469 - Posted: 15 Aug 2016, 22:53:09 UTC - in response to Message 1809199.  

Fifth Force??

UCI physicists confirm possible discovery of fifth force of nature

Irvine, Calif., August 15, 2016 – Recent findings indicating the possible discovery of a previously unknown subatomic particle may be evidence of a fifth fundamental force of nature, according to a paper published in the journal Physical Review Letters by theoretical physicists at the University of California, Irvine.

“If true, it’s revolutionary,” said Jonathan Feng, professor of physics & astronomy. “For decades, we’ve known of four fundamental forces: gravitation, electromagnetism, and the strong and weak nuclear forces. If confirmed by further experiments, this discovery of a possible fifth force would completely change our understanding of the universe, with consequences for the unification of forces and dark matter.”

https://news.uci.edu/research/uci-physicists-confirm-possible-discovery-of-fifth-force-of-nature/
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Message 1815958 - Posted: 9 Sep 2016, 17:58:59 UTC - in response to Message 1809469.  

Dark matter clumps may have punched through star stream

A one-two punch of dark matter may have knocked holes in a stream of stars out past the edge of the Milky Way. If confirmed, these would be the smallest clumps of dark matter we have ever detected.

“Potentially, this stream could allow us to probe for the first time how dark matter behaves on a small scale,” says Sergey Koposov at the University of Cambridge.

https://www.newscientist.com/article/2105275-dark-matter-clumps-may-have-punched-through-star-stream/
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Message 1816092 - Posted: 10 Sep 2016, 4:32:18 UTC

This whole thing with dark matter/dark energy making up over 80% of the universe opens up a lot of possibilities regarding what the nature of that portion of the universe is. Possibilities include parallel universes. additional dimensions and other such things, but also it seems to open up the possibility of things like an afterlife with or without a deity. I certainly don't believe in any traditional concept of heaven or hell but I can entertain the thought of there being a place where our spirits move to after dying.
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.
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Message 1816381 - Posted: 11 Sep 2016, 13:11:59 UTC - in response to Message 1816092.  

This whole thing with dark matter/dark energy making up over 80% of the universe opens up a lot of possibilities regarding what the nature of that portion of the universe is. Possibilities include parallel universes. additional dimensions and other such things, but also it seems to open up the possibility of things like an afterlife with or without a deity. I certainly don't believe in any traditional concept of heaven or hell but I can entertain the thought of there being a place where our spirits move to after dying.



Interesting points you make, Bob. I have been pondering over the existence of anti-dark matter and the role it would play in the evolution of our universe.
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Message 1816413 - Posted: 11 Sep 2016, 14:51:11 UTC - in response to Message 1816381.  

As I have said repeatedly on these forums. Let's send a probe and bring some of it back--if it is infact "Matter"
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Message 1816464 - Posted: 11 Sep 2016, 17:48:21 UTC - in response to Message 1816413.  

As I have said repeatedly on these forums. Let's send a probe and bring some of it back--if it is infact "Matter"

As I recall, dark matter and energy is supposed to be all around us but impossible to see or detect with equipment at our disposal. How convenient. Otherwise they would have to go back to page one and reinvent physics.
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Message 1818419 - Posted: 20 Sep 2016, 10:11:26 UTC - in response to Message 1816464.  

As I have said repeatedly on these forums. Let's send a probe and bring some of it back--if it is infact "Matter"

As I recall, dark matter and energy is supposed to be all around us but impossible to see or detect with equipment at our disposal. How convenient. Otherwise they would have to go back to page one and reinvent physics.


4% of the universe is made out of matter as we know it. Something must fill up the rest of it. A lot of research has been done already on dark matter and dark energy. We know they exist and they have gotten a specified name. We have a broad knowledge already, thanx to research and math of course.
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Message 1822989 - Posted: 9 Oct 2016, 16:34:45 UTC
Last modified: 9 Oct 2016, 16:35:18 UTC

La Repubblica paper says that a galaxy made up from dark matter has been found,called Dragonfly 44, at 300 millions light years in the Berenix Coma constellation. Since La Repubblica is not a scientific journal and also calls it antimatter instead of dark matter, I would wait for confirmation. The discovery has been submitted to "Astrophysical Journal Letters" by Pieter Van Dokkum, Yale University, and Roberto Abraham, Toronto University.
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Message 1823008 - Posted: 9 Oct 2016, 18:18:09 UTC - in response to Message 1822989.  

Pieter van Dokkum. Hmmm...
Yale Professor and chair of Astronomy Pieter van Dokkum photographs and studies dragonflies as an avocation. van Dokkum has just published at book of his photographs and reflections on dragonflies with Yale University Press: "Dragonflies: Magnificent Creatures of Water, Air, and Land."

https://www.youtube.com/watch?v=WPIkTZ4xGP4
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Message 1823658 - Posted: 12 Oct 2016, 5:40:32 UTC - in response to Message 1818419.  
Last modified: 12 Oct 2016, 5:41:35 UTC

4% of the universe is made out of matter as we know it. Something must fill up the rest of it.

I've seen it as "The universe should be a certain shape. To fit that shape, the bits we know about fills 4%. What's the rest?"

A lot of research has been done already on dark matter and dark energy.

Which means nothing we've found says an outright "NO" on the subject.

We know they exist and they have gotten a specified name.

We don't know 'they' exist. We just have a lot of pictures that can be interpreted
And 'a specified name'? Neverland is a name that represents a lot, in terms of stories - doesn't mean it exists in terms of research.

We have a broad knowledge already, thanx to research and math of course.

Mostly math: we think 'x', we found 'y', we want to find z where x-y=z.
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Message 1824087 - Posted: 14 Oct 2016, 1:14:40 UTC

Does this, Universe has two trillion more galaxies than previously thought, go someway to explain missing matter.
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Message 1824150 - Posted: 14 Oct 2016, 6:27:23 UTC

Sometimes I think that what we can see is just one small pie slice sliver of the entire universe. I can't think of a better way to explain my thought.
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Message 1824176 - Posted: 14 Oct 2016, 10:57:56 UTC

Was there a story about an elephant described by blind men? I think we are all blind. God, for inscrutable reasons, made all of us blind (Emilio Segre', on the missed discovery of nuclear fission by the Rome Fermi Group).
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Message 1824185 - Posted: 14 Oct 2016, 11:39:39 UTC - in response to Message 1824176.  

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Message 1831151 - Posted: 18 Nov 2016, 6:11:35 UTC

New study claims dark matter may not exist.
https://www.insidescience.org/news/new-findings-muddy-understanding-dark-matter
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.
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Message 1831196 - Posted: 18 Nov 2016, 13:43:40 UTC - in response to Message 1831151.  
Last modified: 18 Nov 2016, 13:48:22 UTC

Well, It looks like my old friend and Irish Philosopher, Johnny Guinness, may have been right all along.

My own crackpot theory is that we are rotating in perhaps an unseen dimension and that explains the flying apart of galaxies.

However, if we can not capture and examine dark matter, then I think we should do the following:

Carefully write down the math for why we think that there is dark matter and dark energy.
Try to find alternative explanations for the perceived phenomena.

Revisit: Tired light (Fritz Zwicky) and Neutrino Mass.

Also I have always been bothered by statements about far far away galaxies since what we are seeing goes back towards the beginning of time and the Universe. I don't see any allowance in thinking for this fact with all the statements about the galaxies rushing faster the further out that they are. This would have been an era when gravity did not have enough time to slow the expansion from the big bang and the putative inflation.
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Message 1833123 - Posted: 29 Nov 2016, 5:29:37 UTC

machos. strings have mass.
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Message boards : Science (non-SETI) : Dark matter/Dark Energy


 
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