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Universe may be expanding at different rates


Posted on Thursday, 9 April, 2020 | Comment icon 9 comments

What if the universe wasn't the same in every direction ? Image Credit: NASA/ESA/ESO
A new study has cast doubt on the idea that the expansion of the universe is the same in every direction.
The research, which would seem to upend even our most fundamental understanding of the universe, has suggested that rather than expanding at the same rate in all directions, the universe may be expanding faster in some directions than in others.

It's an idea that flies in the face of everything we think we know about the nature of the cosmos.

"One of the pillars of cosmology - the study of the history and fate of the entire universe - is that the universe is 'isotropic,' meaning the same in all directions," said study lead author Konstantinos Migkas.

"Our work shows there may be cracks in that pillar."

As part of the study, Migkas and colleagues studied data from three major observatories to calculate and compare the inherent X-ray luminosity of over 800 distant galaxy clusters.
"We managed to pinpoint a region that seems to expand slower than the rest of the universe, and one that seems to expand faster!" wrote Migkas.

"Interestingly, our results agree with several previous studies that used other methods, with the difference that we identified this 'anisotropy' in the sky with a much higher confidence and using objects covering the whole sky more uniformly."

While there is still work to be done to corroborate and analyze the findings, it's an undoubtedly intriguing result that could serve to teach us much about the nature of the universe.

"It would be remarkable if dark energy were found to have different strengths in different parts of the universe," said study co-author Thomas Reiprich.

"However, much more evidence would be needed to rule out other explanations and make a convincing case."

Source: Space.com | Comments (9)


Tags: Universe, Expansion


Recent comments on this story
Comment icon #1 Posted by Waspie_Dwarf on 8 April, 2020, 21:00
@Tuco's Gas Firstly as a moderator: From the rules: Please provide links to material you quote.
Comment icon #2 Posted by Waspie_Dwarf on 8 April, 2020, 21:11
Now as an ordinary member: Nowhere in your quoted article (which is from Britannica: HERE ) does it mention anything to do with the isotropy hypothesis. No where does it mention a lack of symmetry. It simply does not say what you claim it does. What it is ACTUALLY about is measuring dark energy by measuring the gravitational lensing of massive objects. Whilst you have ably demonstrated your ability to google I'm afraid you have not demonstrated your ability to understand either the original post OR the article you quoted.
Comment icon #3 Posted by joc on 9 April, 2020, 3:04
ESA This is what I really love about it all...what they thought and what they found are all very interesting...but..Hey, let's just don't go with what we found...let's explore all the data to the Nth possibility first...that's what I think is so great about Cosmology and science in general.  There are reasons things go bump in the night. Let's explore them all and compare with the data we have.
Comment icon #4 Posted by Imaginarynumber1 on 10 April, 2020, 5:31
Paper was just published this month https://arxiv.org/abs/2004.03305
Comment icon #5 Posted by DieChecker on 10 April, 2020, 6:52
I think I suggested something similar to this a couple months, to a year, back. That perhaps the expansion of space is non'regular and actually is bumpy. I thought such could explain the reports of "faster then light" observations, as the expansion variable would not be a known constant.
Comment icon #6 Posted by bison on 11 April, 2020, 15:31
If the the uneven expansion of the universe is confirmed, and dark energy is the cause, it raises another interesting question. Why isn't dark energy evenly distributed, on this very large scale, and how did it become unevenly distributed? 
Comment icon #7 Posted by Damien99 on 11 April, 2020, 20:55
I thought nothing moved faster than light?
Comment icon #8 Posted by egodiot on 12 April, 2020, 5:48
And why not? It?s big & cold out there. Get near something hot & things change. #thermodynamics
Comment icon #9 Posted by DieChecker on 12 April, 2020, 15:35
I believe theres been several objects detected that appeared to exceed the speed of light. Some quasars, I believe. But, when they account for expansion of the universe, they drop below lightspeed. However a very few still appeared to exceed lightspeed, even with with expansion included. This might explain such irregularities.


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