# Is the Universal expansion caused by ''heat''?

Discussion in 'Physics & Math' started by Dylan, Oct 8, 2017.

1. ### originHeading towards oblivionValued Senior Member

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Welcome to the internet!
A 'sock puppet' is a slang term that we use on the internet. A sock puppet is defined as a very tall person.

I think you should get back to your questions about the expansion of space, I do not want derail this fascinating thread.

3. ### DylanBannedBanned

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My apologies if being polite offends you kind sir. It is in my nature to be polite and friendly to all. I do not know you sir or have encountered you before. I do not understand kind sir why you seem hostile to somebody new here on the merit of one question and only a few posts.

The ex-chemist kind sir, says:I don't think this is really resolved

Is the answer to the universal expansion not yet concluded?

5. ### DylanBannedBanned

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Thank you for your reply kind Sir . If space does not expand because the space is not made of molecules so cannot retain heat, how would two bodies act on each other in a none inertia situation? What I mean by this kind sir, if there were two bodies magnetically suspended in a vacuum a radius apart, one of the bodies became heated more so than the other. Would this affect the radius between the bodies in any way?

7. ### originHeading towards oblivionValued Senior Member

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If 2 spheres were suspended in a vacuum and if one of the spheres was heated then it would expand, therefore the distance between them would decrease.

8. ### DylanBannedBanned

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Thank you kind sir for your reply. According to thermodynamics, both objects will try to reach room temperature, the heat from the hotter object will try to transfer to the colder object. Is heat attracted to the cold?

Do the objects if in an imaginary stationary position gain any velocity towards each other by having different temperatures?

9. ### originHeading towards oblivionValued Senior Member

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Hot objects will transfer heat out of the object until the heat transfer into the object equals the heat transferred out of the object.
No.
No.

10. ### DylanBannedBanned

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Thank you for your answers kind sir. How does heat transfer from one object to another?

11. ### exchemistValued Senior Member

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Why room temperature? Or are you assuming that the walls of the container enclosing the vacuum are at room temperature?

If both objects are in a vacuum, the only way for heat to transfer between them is via the radiation that all matter above absolute zero gives off, in all directions. The walls of the container enclosing the vacuum will also be radiating of course. So the net result will be that the temperature of the objects will approach that of the walls, given long enough (so long as the container has a large heat capacity compared to the objects of course).

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13. ### Jordan.SRegistered Member

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From what i know sockpuppet is a person who pretends to be others, often to push an agenda or troll an audience. Sockpuppeting the act- is when a person uses an alternate account to pose as a separate person. Hmm the more i write about this explanation...the more that i think about Instagram

14. ### originHeading towards oblivionValued Senior Member

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You are more than welcome my fine fellow.
It certainly seems like you post quite similar to TonyC and John P. who are sock puppets (very tall). I am reporting your initial post to see if you are as tall as they were.

15. ### DylanBannedBanned

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Thank you kind sir for answering my question.

16. ### DylanBannedBanned

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Thank you for your answer kind sir. From another answer given, if an object in a room is heated, the heat of the object is also released into the atmosphere, colder objects with then absorb this heat?

17. ### DylanBannedBanned

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Tony C, John P?

You seem to think I am not me, I have already said that I am new here and new to the internet. My name is Dylan , please to meet you sir. What is your name?

18. ### originHeading towards oblivionValued Senior Member

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To state this clearly, I can say that in a perfectly insulated room all of the objects in the room would reach an equilibrium temperature. Objects that were initially below this equilibrium temperature would increase in temperature and objects that initially were below this equilibrium temperature would decrease in temperature.

So it sounds like this other poster and I agree.

19. ### DylanBannedBanned

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Thank you kind sir for the clarification. I have read earlier on the internet something about the universal expansion is caused by dark matter? What is this dark matter please kind sir?

20. ### timojinValued Senior Member

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Why don't you stop persecuting and contribuite with your under

21. ### originHeading towards oblivionValued Senior Member

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Expansion is not caused by dark matter. You must have misread the article or you went to a junk science site. Wiki is usually a pretty good source of information.

22. ### timojinValued Senior Member

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https://www.newscientist.com/articl...ssing-matter-has-just-been-finally-found/amp/
You could start thinking less about dark matter . They just found some in the garbage in the space

The missing links between galaxies have finally been found. This is the first detection of the roughly half of the normal matter in our universe – protons, neutrons and electrons – unaccounted for by previous observations of stars, galaxies and other bright objects in space.

You have probably heard about the hunt for dark matter, a mysterious substance thought to permeate the universe, the effects of which we can see through its gravitational pull. But our models of the universe also say there should be about twice as much ordinary matter out there, compared with what we have observed so far.

Two separate teams found the missing matter – made of particles called baryons rather than dark matter – linking galaxies together through filaments of hot, diffuse gas.

“The missing baryon problem is solved,” says Hideki Tanimura at the Institute of Space Astrophysics in Orsay, France, leader of one of the groups. The other team was led by Anna de Graaff at the University of Edinburgh, UK.

Because the gas is so tenuous and not quite hot enough for X-ray telescopes to pick up, nobody had been able to see it before.

“There’s no sweet spot – no sweet instrument that we’ve invented yet that can directly observe this gas,” says Richard Ellis at University College London. “It’s been purely speculation until now.”

So the two groups had to find another way to definitively show that these threads of gas are really there.

Both teams took advantage of a phenomenon called the Sunyaev-Zel’dovich effect that occurs when light left over from the big bang passes through hot gas. As the light travels, some of it scatters off the electrons in the gas, leaving a dim patch in the cosmic microwave background – our snapshot of the remnants from the birth of the cosmos.

Stack ‘em up
In 2015, the Planck satellite created a map of this effect throughout the observable universe. Because the tendrils of gas between galaxies are so diffuse, the dim blotches they cause are far too slight to be seen directly on Planck’s map.

Both teams selected pairs of galaxies from the Sloan Digital Sky Survey that were expected to be connected by a strand of baryons. They stacked the Planck signals for the areas between the galaxies, making the individually faint strands detectable en masse.

Tanimura’s team stacked data on 260,000 pairs of galaxies, and de Graaff’s group used over a million pairs. Both teams found definitive evidence of gas filaments between the galaxies. Tanimura’s group found they were almost three times denser than the mean for normal matter in the universe, and de Graaf’s group found they were six times denser – confirmation that the gas in these areas is dense enough to form filaments.

“We expect some differences because we are looking at filaments at different distances,” says Tanimura. “If this factor is included, our findings are very consistent with the other group.”

Finally finding the extra baryons that have been predicted by decades of simulations validates some of our assumptions about the universe.

“Everybody sort of knows that it has to be there, but this is the first time that somebody – two different groups, no less – has come up with a definitive detection,” says Ralph Kraft at the Harvard-Smithsonian Center for Astrophysics in Massachusetts.

“This goes a long way toward showing that many of our ideas of how galaxies form and how structures form over the history of the universe are pretty much correct,” he says.

Journal references: arXiv, 1709.05024 and 1709.10378v

23. ### originHeading towards oblivionValued Senior Member

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Not sure what you are talking about. I have contributed quite a bit to this thread with my under!