Universe appears to expand at different rates

[LogicalFallacy]

https://www.space.com/41163-universe-expansion-rate-changes-near-far.html?utm_source=notification 

[♦ Fuego ♦]

The more we learn, the more we find to learn.

 

[pantheory]

13 hours ago, LogicalFallacy said:

https://www.space.com/41163-universe-expansion-rate-changes-near-far.html?utm_source=notification 

 

"Universe appears to expand at different rates"

 

I, and another researcher, did a study of variable expansion rates of the universe in 2013 concerning type 1a supernovae data. This was much more data than what was available when they proposed the existence of dark energy. We instead concluded that the Hubble distance formula was incorrect, by about 8% in the "nearby" universe, and off by a much greater extent in the more distant universe. Using alternative theory and the supernovae data we instead proposed an alternative formulation for galactic distances as an alternative to the Hubble distance formula. This proposed formulation matched the supernovae data very well so we thereby concluded that variable expansion rates of the universe and dark energy probably do not exist.

 

We had a somewhat similar conclusion in a more recent study and paper concerning the non-existence of dark matter.

 

http://revolution-green.com/new-research-study-concluded-dark-energy-probably-exist/

 

For greater detail refer to the paper itself.

 

http://www.ccsenet.org/journal/index.php/apr/article/view/32603

 

 

 

 

 

 

[♦ nivek ♦]

P...

 

Clicked links.  Read a bit.

Would we had a 'mind blown all to fuck'nback emoji'.
I am more grounded so to speak being a glorified fanboi of geology and topography-mapping.

 

Working those distances, making stars and celestial items into things we mere mortals 
amazes me beyond simple words.

Friend in PDX, Dr. Dick Pugh met through Cascadia Meteorite Laboratory some years ago introduced me to actually looking up past dirt and rocks.

Eastern Oregon is desert, should be great country for finding star dust fragments.  So far no such fortune, BUT learning ever so little and slowly of what could be out there more fascinated and needy for information things this end become.

So appreciate your posts even as I find myself scratching my bare ass while eating 'nanners and tossing peels at passing strangers.

 

kL

[LogicalFallacy]

So here's a related article. 

 

https://www.space.com/41207-dark-matter-dark-energy-planck-spacecraft.html?utm_source=notification 

 

 

Snipped

 

Quote

 

An expanding mystery

Planck's data have also helped astronomers nail down the rate of the universe's expansion, a value known as the Hubble constant. According to Planck's observations of the distant early universe, the Hubble constant is 67 kilometers per second for every 1 million parsecs of separation in space (67 km/s/Mpc). (One parsec is about 3.26 light-years.)

But that number is far from definitive. In fact, it differs from the figure derived using observations of relatively nearby phenomena using NASA's Hubble Space Telescope and ESA's Gaia spacecraft — 73.5 km/s/Mpc.

That difference may seem small, but it's significant, researchers said.

"There is no single, satisfactory astrophysical solution that can explain the discrepancy," LFI deputy principal investigator Marco Bersanelli, of the University of Milan in Italy, said in the same statement. "So, perhaps there is some new physics to be found."

Or perhaps not.

"For the moment, we shouldn't get too excited about finding new physics; it could well be that the relatively small discrepancy can be explained by a combination of small errors and local effects," Tauber said. "But we need to keep improving our measurements and thinking about better ways to explain it."

 

 

The OP article talks about a different speed variable between closer galaxies and ones further away.

 

It would seem the universe is expanding and moving... just at different speeds we find hard to pin down.

 

 

[disillusioned]

This is really interesting stuff.

 

I'm currently reading Jim Holt's book When Einstein Walked with Godel: Excursions to the Edge of Thought. Despite the title, it's not actually that concerned with either Einstein or Godel. This came as a surprise to me, and, to a certain extent, caused me some disappointment. Einstein and Godel are two of my favourite people. But it's a solid read, nonetheless. It's a collection of essays on various topics including physics and mathematics. Very interesting. Really, really good stuff.

 

The essay I just read was called "How Will the Universe End?", and it's relevant here. Just as an fyi for anyone who's interested. Check it out.

[Bedouin]

Here’s something that confuses me.  I’ve watched some videos and read some articles that state that the Andromeda galaxy is rushing towards our galaxy. How is this possible if the universe is expanding?

[disillusioned]

31 minutes ago, Bedouin said:

Here’s something that confuses me.  I’ve watched some videos and read some articles that state that the Andromeda galaxy is rushing towards our galaxy. How is this possible if the universe is expanding?

 

Good question Bedouin.

 

Very briefly: think of the universe as the steam above a pot of boiling water. The steam is clearly, on the whole, expanding. But any two given molecules of water in the cloud might be moving towards each other at any given moment. This is roughly analogous to how the universe can be expanding while our galaxy and Andromeda are approaching each other.

 

I can spend more time on this if you like. I'm a little busy at the moment, but if you're still confused, let me know.

[sdelsolray]

5 hours ago, Bedouin said:

Here’s something that confuses me.  I’ve watched some videos and read some articles that state that the Andromeda galaxy is rushing towards our galaxy. How is this possible if the universe is expanding?

 

The Andromeda Galaxy and the Milky Way are approaching each other because their combined velocities towards each other is greater that the speed of the expansion between them.

[Bedouin]

Thanks all for the explanations. The steam analogy makes sense, I guess. . Space is weird.  We exist in a universe that appears clam from our viewpoint, but really is extremely violent.  Blows my mind.