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James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

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Re: James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

#31

Post by gagaJo »

addaon wrote: post #21
gagaJo wrote: post #16

Cosmology feels a lot like quackery these days. Does it even bother to rely on physics? Physical experiments show explosions do not propel all matter at the same rate. James Webb telescope recently found galaxies that were “too old”, would have formed right after the Big Bang. The prevailing wisdom was all matter spread out evenly due to the Big Bang, then coalesced into galaxies (I emailed various researchers to con…

> explosions… explosions What are you drawing an analogy to explosions with in this comment? The Big Bang? Why do you expect the analogy to be as precise as you seem to take it to be?

Because researchers put on emotional costumes to serve how they pay for food and shelter, spend their time defending crap results for years/decades.

Let’s not pretend the replication crisis isn’t real and endemic within academia these days.

Re: James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

#32

Post by WithinReason »

gagaJo wrote: post #16

Cosmology feels a lot like quackery these days. Does it even bother to rely on physics? Physical experiments show explosions do not propel all matter at the same rate. James Webb telescope recently found galaxies that were “too old”, would have formed right after the Big Bang. The prevailing wisdom was all matter spread out evenly due to the Big Bang, then coalesced into galaxies (I emailed various researchers to con…

The Big Bang has nothing to do with explosions

Re: James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

#33

Post by magicalhippo »

cl42 wrote: post #6

Can someone more familiar with the science help me out? - On the one hand, the universe can be expanding at different rates. - On the other hand, is it possible our approach to measuring the expansion (e.g., using Cepheid variable stars) might be the problem?

Becky Smethurst, an astrophysicist, goes through how the cosmic distance ladder works and the recent JWST results here[1].

As you say, measurement errors of Cepheid stars has been something scientists considered a possibility, hence why they're cross-checking by measuring them in different ways.

And, as mentioned in the posted article and the other papers mentioned in the video, it seems that measurement errors are very unlikely to be the culprit.

Preprints to the articles Becky mentions are here[2][3][4].

[1]: https://www.youtube.com/watch?v=3NeKR7bqolY&t=1330s

[2]: https://arxiv.org/abs/2401.04773

[3]: https://arxiv.org/abs/2401.04776

[4]: https://arxiv.org/abs/2401.04777

Re: James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

#36

Post by Workaccount2 »

gagaJo wrote: post #16

Cosmology feels a lot like quackery these days. Does it even bother to rely on physics? Physical experiments show explosions do not propel all matter at the same rate. James Webb telescope recently found galaxies that were “too old”, would have formed right after the Big Bang. The prevailing wisdom was all matter spread out evenly due to the Big Bang, then coalesced into galaxies (I emailed various researchers to con…

The fact that you seem to be interested enough to email experts about ancient galaxies, yet still are referencing the big bang as an explosion, leaves me utterly confused about your level of knowledge, but leaning heavily towards "no idea what they are talking about".

The big bang was not an explosion.

Re: James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

#37

Post by epgui »

foobarian wrote: post #29

I get that the universe can be expanding, and that there might be different methods to calculate/measure this that have discrepancies. But that the rate of expansion is accelerating , how in the world is that possible?

What makes you think that should not be possible?

It's a pretty well accepted fact.

Re: James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

#38

Post by notaustinpowers »

m3kw9 wrote: post #28

I thought universe is infinitely large, how is it expanding

From my understanding, The infinitely large theory relies on the Universe being incredibly complex in terms of dimensions. The best way to describe it is like a balloon Take a deflated balloon and draw two dots next to each other on it. Then blow up the balloon. The dots are further away from each other (universe expansion). And if you "walk" across the balloon, you can make a full circumference so you never run into an edge (infinite).

Re: James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

#39

Post by gagaJo »

nabla9 wrote: post #30
gagaJo wrote: post #16

Cosmology feels a lot like quackery these days. Does it even bother to rely on physics? Physical experiments show explosions do not propel all matter at the same rate. James Webb telescope recently found galaxies that were “too old”, would have formed right after the Big Bang. The prevailing wisdom was all matter spread out evenly due to the Big Bang, then coalesced into galaxies (I emailed various researchers to con…

What you explain is the confusion that comes from reading news articles about science ans succumbing to nihilism and conspiracy theories.

[flagged]

Re: James Webb Telescope Confirms That the Universe Is Expanding at Different Speeds

#40

Post by Aachen »

m3kw9 wrote: post #28

I thought universe is infinitely large, how is it expanding

It's not that there is a shifting boundary where the universe ends, but what is meant with universe expansion is (per my understanding) that objects grow further apart over time without experiencing acceleration or any force acting upon them. It's like drawing a map on grid paper and then increasing the grid size without adjusting the scale: all distances become larger

This stretching includes any photons traveling across the grid, and the stretching causes them to expand. Longer wavelengths are more red, giving us the word redshift for stretched light rays. That's one of the ways we measure the expansion: see how much redder the light is as you look at more and more distant objects

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