Hubble trouble or Superbubble? Astronomers need to escape the 'supervoid' to solve cosmology crisis

[Admin]

The disagreement in the rate of expansion of the universe, the Hubble tension, could arise from the fact Earth sits in an under-dense supervoid region of space.

Hubble trouble or Superbubble? Astronomers need to escape the 'supervoid' to solve cosmology crisis : Read more

 

[Don M]

The Universe's "incredibly rapid rate" of expansion depends on perspective. The current rate is ~7% larger every billion years.

 

[Crazy Raven]

There's a statement that states that a mega parsec is 3.26 light years or about 6 trillion miles 9 tkm. Is it though ? Let's do math.
1 light years is about 6 trillion miles, 9 trillion km.
1 parsec is 3.26 light years, thars 19.2 million miles, 30.9 trillion km.
1 mega parsec is 3.26 light years, times 1 million. That's 3.26 plus 21 zeros, I think. Anyway I hope I'm mostly right on that last one. To be sure you couldn't drive there. This my first reply on space, please be kind lol.

 

[Crazy Raven]

There's a statement that states that a mega parsec is 3.26 light years or about 6 trillion miles 9 tkm. Is it though ? Let's do math.
1 light years is about 6 trillion miles, 9 trillion km.
1 parsec is 3.26 light years, thars 19.2 million miles, 30.9 trillion km.
1 mega parsec is 3.26 light years, times 1 million. That's 3.26 plus 21 zeros, I think. Anyway I hope I'm mostly right on that last one. To be sure you couldn't drive there. This my first reply on space, please be kind lol.

I meant 19.2 trillion miles oops.

 

[danR]

The article is interesting but seems rather repetitious. I feel it would be more lucidly presented in four or five paragraphs.

 

[Torbjorn Larsson]

It fails before getting started as it proposes a non-relativistic MOND model.

The νHDM model assumes Milgromian dynamics (MOND; Milgrom 1983, 2014).

 

[Helio]

It's still fuzzy just what the tension is, but this article seems to be saying that at the time of the CMBR (13.8 Gyrs ago) the expansion rate was slower. But the tension isn't comparing today's rate with the rate at the time of the CMBR, but, rather, the extrapolated rate of the CMBR. IOW, the theoretical rate that we should have today, using assumptions like DE, is being compared with the observed expansion rate. Is this the "tension"?

But can we accurately model today the historic DE effect on the cosmos, at least from our point of view? Then there's the likelihood that DE isn't an acceleration, but and acceleration rate of acceleration (jerk) since DE keeps getting strong with time. Isn't this right?

The other main force determining the rate, of course, is the gravitational effect of spacetime. So, yes, our large "void" would have a little less pull-back by gravity, thus DE would gain even more speed. But is this difference adequate to explain the tension?

 

[George²]

That's 3.26 plus 21 zeros

No. Make another try with algebra.
And yes zillion has 21 zeros but you is too south from zillion parsecs or from light years. If you have miles on mind then number of 3.26 is wrong.