Einstein Was Right!

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hal2kilo

Lifer
Feb 24, 2009
26,042
12,274
136
Does this mean the centre of the galaxy is a drain?
No, everything is spreading further apart because of (they really don't know). When physicists stop faking themselves out with math fantasies they might figure out what dark matter/energy really is.
 

Moonbeam

Elite Member
Nov 24, 1999
74,736
6,759
126
No, everything is spreading further apart because of (they really don't know). When physicists stop faking themselves out with math fantasies they might figure out what dark matter/energy really is.
Is everything spreading apart or is nothing collapsing inward and pushing it out?
 

pmv

Lifer
May 30, 2008
15,142
10,040
136
So...we're going to accept using one theory to prove another?
When it comes to things we can't really see or "dissect" in a lab setting, it comes down to a bunch of "intelligent guess work."

Don't we always use "one theory to prove another"? Aren't all observations "theory laden"?
 

Moonbeam

Elite Member
Nov 24, 1999
74,736
6,759
126
Don't we always use "one theory to prove another"? Aren't all observations "theory laden"?
There is a poem that reminds me a lot of you.

A centipede was happy – quite!
Until a toad in fun Said,
"Pray, which leg moves after which?"
This raised her doubts to such a pitch,
She fell exhausted in the ditch
Not knowing how to run.

I suppose, however, to prove my point will mean I’ll have to find a one armed economist.

In the mean time I offer you this help:

Two Monks were walking through the jungle discussing the nature of reality. The first told the second that everything is an illusion. An angry elephant appeared on the trail ahead of them and suddenly charged. The first Monk quickly ran up a tree while the second, considering the remarkable notion of delusion stood transfixed on the ground. I’m sure that even a theorist of your caliber can guess the result.

Laying quite the worse for wear on the ground he called up to his friend in the tree and exclaimed, “I thought you said everything is an illusion. Why did you run up the tree?” “Yes”, the first Monk said, “ My running up the tree was an illusion too.”
 

Paratus

Lifer
Jun 4, 2004
17,638
15,827
146
No, everything is spreading further apart because of (they really don't know). When physicists stop faking themselves out with math fantasies they might figure out what dark matter/energy really is.
No everything is not spreading further apart. Gravitationally bound structures like the Milky Way and our local group are not spreading farther apart. Galaxies further away however are speeding away.

Math fantasies? Dark matter is called dark matter because the “bright” matter we can see in galaxies are rotating fast enough that they should not be able to hold together from the gravity that matter provides - except they do. So galaxies act as if there is more matter creating more gravity than we can see. Dark Matter is a placeholder for that effect. That effect means it supplies an attractive force and doesn’t interact with most matter we can see.

Likewise dark energy is a placeholder for the accelerating expansion of the universe we see.

It will be math coupled to evidence that eventually figures them out.
 

pmv

Lifer
May 30, 2008
15,142
10,040
136
Math fantasies? Dark matter is called dark matter because the “bright” matter we can see in galaxies are rotating fast enough that they should not be able to hold together from the gravity that matter provides - except they do. So galaxies act as if there is more matter creating more gravity than we can see. Dark Matter is a placeholder for that effect. That effect means it supplies an attractive force and doesn’t interact with most matter we can see.

I heard a podcast not long ago comparing the "dark matter" hypothesis with the old idea that there was a planet between Mercury and the Sun (it got provisionally-named "Vulcan", funnily enough).

In that case the posited hidden planet was needed to explain the observations that were ultimately instead explained by changes to the theory, in the form of relativity supplanting Newton (I remember the issue with Mercury turning out to be a significant success for relativity from studying physics at university, but didn't till just now know that historically it had been posited that an unseen planet was causing it).

Seemed to imply that it might likewise turn out that Dark Matter is an artifact of some incompleteness in the theory rather than a material substance.
 

Muse

Lifer
Jul 11, 2001
40,871
10,222
136
Einstein went out on a lot of limbs, he did it again and again, and practically all the time he was proven right. I'm not sure there are any exceptions. Perhaps, his difficulty in accepting quantum mechanics is the exception. He said "God does not play dice." So, I'm told.
 

hal2kilo

Lifer
Feb 24, 2009
26,042
12,274
136
No everything is not spreading further apart. Gravitationally bound structures like the Milky Way and our local group are not spreading farther apart. Galaxies further away however are speeding away.

Math fantasies? Dark matter is called dark matter because the “bright” matter we can see in galaxies are rotating fast enough that they should not be able to hold together from the gravity that matter provides - except they do. So galaxies act as if there is more matter creating more gravity than we can see. Dark Matter is a placeholder for that effect. That effect means it supplies an attractive force and doesn’t interact with most matter we can see.

Likewise dark energy is a placeholder for the accelerating expansion of the universe we see.

It will be math coupled to evidence that eventually figures them out.
If it connects to true physical reality.
 
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hal2kilo

Lifer
Feb 24, 2009
26,042
12,274
136
There is a poem that reminds me a lot of you.

A centipede was happy – quite!
Until a toad in fun Said,
"Pray, which leg moves after which?"
This raised her doubts to such a pitch,
She fell exhausted in the ditch
Not knowing how to run.

I suppose, however, to prove my point will mean I’ll have to find a one armed economist.

In the mean time I offer you this help:

Two Monks were walking through the jungle discussing the nature of reality. The first told the second that everything is an illusion. An angry elephant appeared on the trail ahead of them and suddenly charged. The first Monk quickly ran up a tree while the second, considering the remarkable notion of delusion stood transfixed on the ground. I’m sure that even a theorist of your caliber can guess the result.

Laying quite the worse for wear on the ground he called up to his friend in the tree and exclaimed, “I thought you said everything is an illusion. Why did you run up the tree?” “Yes”, the first Monk said, “ My running up the tree was an illusion too.”
This has always been my favorite song about the galaxy.

Whenever life gets you down, Mrs Brown
And things seem hard or tough
And people are stupid, obnoxious or daft
And you feel that you've had quite enough
Just remember that you're standing on a planet that's evolving
And revolving at nine hundred miles an hour
It's orbiting at nineteen miles a second, so it's reckoned
A sun that is the source of all our power
The sun and you and me and all the stars that we can see
Are moving at a million miles a day
In an outer spiral arm at forty thousand miles an hour
Of the galaxy we call the Milky Way
Our galaxy itself contains a hundred billion stars
It's a hundred thousand light years side to side
It bulges in the middle sixteen thousand light years thick
But out by us, it's just three thousand light years wide
We're thirty thousand light years from galactic central point
We go round every two hundred million years
And our galaxy is only one of millions of billions
In this amazing and expanding universe
The universe itself keeps on expanding and expanding
In all of the directions it can whizz
As fast as it can go – the speed of light, you know
Twelve million miles a minute and that's the fastest speed there is
So remember when you're feeling very small and insecure
How amazingly unlikely is your birth
And pray that there's intelligent life somewhere up in space
'Cause there's ah heck all down here on earth

Songwriters: Eric Idle, Trevor Jones. For non-commercial use only.
 

Moonbeam

Elite Member
Nov 24, 1999
74,736
6,759
126
Long ago I attended a concert at the Oakland Coliseum, a huge place with a very high ceiling. Suddenly I was gripped by the feeling the world was turning up side down and I was going to fall to it. Imagine a universe where you fall up rather than down.

I often think about falling through space having read that’s how the trans-spaceship Karnak managed things: