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re: Hubble data: Universe "weirdly" expanding faster than expected.

Posted on 5/21/22 at 8:21 am to
Posted by BigBobbyStorey
New Lodge, Belfast
Member since May 2021
1058 posts
Posted on 5/21/22 at 8:21 am to
they said "universe" but meant "BigBobbyStoreys Ex Wife"
Posted by KLSU
Baton Rouge
Member since Sep 2003
10303 posts
Posted on 5/21/22 at 8:23 am to
These same people can’t see when an astroid is heading our way until it’s in our solar system but you are going to tell me they know how to calculate how fast the universe is expanding? Okay.

When we can accurately predict the weather for tomorrow maybe I’ll listen.
Posted by UndercoverBryologist
Member since Nov 2020
8077 posts
Posted on 5/21/22 at 9:11 am to
quote:

These same people can’t see when an astroid is heading our way until it’s in our solar system but you are going to tell me they know how to calculate how fast the universe is expanding? Okay.



It’s actually fairly straightforward, depending on the precision of your instruments.

The level of red-shift (Doppler Effect) of a galaxy is proportional to the rate of recession from the observer (which in this case, can be generalized to the entire Milky Way galaxy).

You first do as Edwin Hubble did and observe that, in general, the entire universe is red-shifted (key phrase “in general”). And then you notice that the farther a galaxy is away, the more it’s red-shifted. Then you take what we we know about light and apply an equation to get a generalized figure for the rate of acceleration.

quote:

When we can accurately predict the weather for tomorrow maybe I’ll listen.


We can already basically predict the weather for tomorrow with a high degree of certainty:It’s the weather a week, a month, a year, a decade, etc. that becomes hard to predict because the weather is a complex, chaotic system.

It’s not that the universe itself isn’t also chaotic. But if you rewound the motion of the universe back far enough, when everything is sufficiently close to one another compared to today, the universe would collapse under gravity. That we can be reasonably sure of. It is just inevitable. So, in essence, there has to be a sort of “anti-gravity” force acting on the universe to keep it expanding.
Posted by theunknownknight
Baton Rouge
Member since Sep 2005
57316 posts
Posted on 5/21/22 at 10:12 am to
How does this work from a flat earth perspective?
Posted by Turf Taint
New Orleans
Member since Jun 2021
6010 posts
Posted on 5/21/22 at 10:47 am to
My waist is expanding at increasing rate, too. I have always been one with the universe (and Oreos).

Posted by RogerTheShrubber
Juneau, AK
Member since Jan 2009
260562 posts
Posted on 5/21/22 at 10:48 am to
quote:

How does this work from a flat earth perspective?


The universe is only expanding upwards.
Posted by USMCguy121
Northshore
Member since Aug 2021
6332 posts
Posted on 5/21/22 at 11:41 am to
What's it expanding into?
Posted by IAmNERD
Member since May 2017
19233 posts
Posted on 5/21/22 at 12:16 pm to
quote:

the universe will asymptote to a non-zero positive temperature value at maximum entropy and no further work being possible

TWSS
Posted by Korkstand
Member since Nov 2003
28708 posts
Posted on 5/21/22 at 2:40 pm to
quote:

If the universe is expanding, doesn’t that imply it all must be diverging from a single point?
No. That would happen if there is an explosion in space. The big bang and the expansion we see is an "explosion" of space.
quote:

Have we found that point?
If you try to find the center point of expansion, it turns out that no matter where you look that point appears to be the center. That's how we know that space itself is expanding.
Posted by Adam4LSU
Baton Rouge
Member since Mar 2008
13760 posts
Posted on 5/21/22 at 2:52 pm to
quote:

Hubble data: Universe "weirdly" expanding faster than expected.


damn, I guess climate change is real after all
Posted by SG_Geaux
Beautiful St George
Member since Aug 2004
77977 posts
Posted on 5/21/22 at 3:41 pm to
quote:

67.5 kilometers per second per megaparsec


How does that compare with the Falcon's Kessel Run?
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