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The universe is expanding. but astrophysicists aren't sure how fast
LiveScience.com ^ | Aug 7, 2018 | Thomas Kitching, UCL

Posted on 08/08/2018 11:39:48 AM PDT by ETL

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To: ETL

“The other reason is that since the laws of science break down as you approach the creation of the universe, there’s no reason to believe the first law of thermodynamics would apply.”

This also means there is no reason to believe any of their models of what might happen would apply either. You simply cannot extrapolate if you can’t assume that the conditions you are extrapolating based on will remain consistent with what you can observe or infer from experiment. Once you assume those conditions change, if you continue to extrapolate you are just fudging the model to insert whatever conditions produce the results you desire.

“Some critics say that the formation of stars and galaxies violates the law of entropy, which suggests systems of change become less organized over time. But if you view the early universe as completely homogeneous and isotropic, then the current universe shows signs of obeying the law of entropy.”

The law of entropy doesn’t really say that systems become less organized, that is just a consequence. The law actually says that the system will tend to become more homogeneous, with every point in the system tending towards the same, lowest possible energy level. If the system was already completely homogeneous to begin with, then it would require an input of energy from outside the system to change that. However, the Big Bang theory treats the universe as a closed system, with no possible outside input. So there is definitely a contradiction there. Either it can’t start out homogeneous, or it can’t be a closed system. You can’t have it both ways.

“Another related response is that space itself can expand faster than the speed of light, as space falls outside the domain of the theory of gravity.”

Well, if we are talking relativity, space is integral to the theory of gravity, since it is distortion of space itself that produces the phenomenon of gravity. However, according to relativity, space must be able to transmit gravity instantaneously, so space being able to expand faster than the speed of light should not be a contradiction.


41 posted on 08/08/2018 2:51:51 PM PDT by Boogieman
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To: ETL

“According to most ‘experts’, nothing.”

Maybe the universe is not expanding at all. Maybe everything is just shrinking :)


42 posted on 08/08/2018 2:53:06 PM PDT by Boogieman
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To: Conan the Librarian

Black holes would have to not just be shrinking faster, but shrinking faster than the speed of light. That would account for why light could not escape, and why we could never observe them directly.


43 posted on 08/08/2018 2:55:10 PM PDT by Boogieman
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To: blueunicorn6

I want an equal number of galaxies in every universe, no excuses!!!

44 posted on 08/08/2018 2:57:01 PM PDT by Boogieman
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To: roadcat

“But isn’t time relative depending on the observer and what is being observed?”

That’s a tricky question. Relativity assumes that there is no universal frame of reference, so there isn’t some outside place that we can measure distances (including time) based on and apply it to all the different frames that observers are seeing.

That being said, if you really start critically examining relativity, there is a strong implication in some of the results that there IS a universal frame of reference. So it may well be that there is a universal standard we could measure time based on, independent of any observers, and Einstein just made the wrong assumption.


45 posted on 08/08/2018 3:04:48 PM PDT by Boogieman
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To: Pikachu_Dad

Chuck Norris is the singularity!
There can be only one chuck Norris!


46 posted on 08/08/2018 4:48:20 PM PDT by tet68 ( " We would not die in that man's company, that fears his fellowship to die with us...." Henry V.)
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To: Boogieman

Well the singularity is already there, formed by the supernova or whatever force caused it.

Space CAN move faster than the speed of light (otherwise we could see things beyond our horizons). The event horizon is just where space starts REALLY shrinking.

Quick, Someone hire Sheldon Cooper to do the math. I can see a Nobel in my future!


47 posted on 08/08/2018 5:32:34 PM PDT by Conan the Librarian (The Best in Life is to crush my enemies, see them driven before me, and the Dewey Decimal System)
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To: Boogieman
So it may well be that there is a universal standard we could measure time based on, independent of any observers, and Einstein just made the wrong assumption.

It is all so confusing to me, hence I said I won't lose sleep thinking about it. After we began space flights, scientists tested the validity of Einstein's theories about time being relative depending on frames of reference. Two identical timepieces, one stayed on Earth while another was carried by astronauts on a space journey. After the astronauts landed, the two timepieces were compared and differed in elapsed time, the reality just as calculated by theory. Elapsed time was less for the fast-moving astronauts. So confusing!

48 posted on 08/08/2018 6:45:47 PM PDT by roadcat
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To: youngidiot; ETL

“What’s the universe expanding into????”

According to this thread, the universe is expanding into a hot fresh blueberry muffin.

(post 25)


49 posted on 08/08/2018 9:01:52 PM PDT by Redcitizen
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To: ETL

Well, it looks like i have a lot of reading to do...


50 posted on 08/30/2018 6:12:36 PM PDT by AFPhys ((Liberalism is what Smart looks like to Stupid people - ® - Mia of KC. Rush - 1:50-8/21/15))
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