Cosmic Catastrophe

[aerohead]

Sensors appears to be the challenge.
Astronomer Fritz Zwicky 'discovered' dark matter in 1937 by default, while attempting to reconcile discrepancies between fugacity and VIRIAL Theorem, kinetic energy, versus known mass in the galaxy. The mathematics pointed directly at 'hidden' mass ( dark matter ).
In 1970, astronomer Vera Rubin couldn't reconcile galactic rotation, orbital velocities, doppler effect, steller velocity vs mass orbiting far from the galactic center.
For the math to work, orbits must be enclosing more mass to explain orbital velocity.
The 'visible' galaxy could only be a small fraction of total mass.
They've ruled out:
* stars
* dust
* cool gas
* neutrons
* protons
* infrared signals
* radio signals
* absorbancy of light
* participation in nuclear reactions
So far, all they can do is observe how light is bent by the gravity of the dark matter.

[oil pan 4]

Originally Posted by aerohead

I watched a Great Courses, 24- hour lecture series on 'Black Holes, Tides, and Curved Spacetime', by PhD Theoretical Physics, Benjamin Schumacher, Kenyon College, which gets into dark matter and dark energy, among many things.
It appears that it's very real.
It can be 'viewed' only by gravity lensing, and how it's gravity distorts things. Maps have been made of it.

If it's so real why have they been looking for magical dark matter particles for 30 years with very expensive toys and always find exactly nothing?
Aether appeared very real too.
At somepoint you just can't ignore observations.

[oil pan 4]

Originally Posted by aerohead

Wikipedia mentions that all nova have to do with white dwarfs in a binary system.
That would exclude the Sun.
I read an entire book on Oppenheimer and don't recall any mention in belief of ancient weapons of mass destruction of the scale of modern thermonuclear devices.

Still cinging to outdated science I see. I can't help you with that.

If Oppenheimer acknowledged the existence of ET in print they woud have locked him up in the loony bin because that's what they did back then. Anyone who talked about aliens was dangerous, crazy, a communist, ect.
So he spoke in innuendo, you can do that when you are another level higher intelligence than your "superiors".
He obviously can "get with the program" and still get what he wants, as he did very well in nazi Germany.

[freebeard]

They keep finding cold dust where the 'dark matter' is supposed to be. Eventually it will click into focus.

[oil pan 4]

Yeah these weird magical dark matter particles are turning out to be regular matter. The simplest solution is usually correct.

[aerohead]

Originally Posted by oil pan 4

If it's so real why have they been looking for magical dark matter particles for 30 years and always find exactly nothing?
Aether appeared very real too.
At somepoint you just can't ignore observations.

'looking' would be futile, as it's invisible.
they have located it, although they still can't 'see' it.
all they can do is observe the effect it has.
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we can't see pheromones but they're there.
we can't see radioactivity but it's there.
we can't see infrared radiation but it's there.
we can't hear infrasound but it's there.
we can't hear ultrasonic but it's there.
we can't see an alcohol fire during daylight but it's there.
radio
gamma rays
X-rays
we DO have sensors though. Just not for dark matter.
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Physicists want a unified field theory which can explain all phenomena, from the macro to quantum scale. We're a curious lot, and I suppose they'll just keep trying.
Dark matter and dark energy are part of that calculus.

[aerohead]

Originally Posted by oil pan 4

Yeah these weird magical dark matter particles are turning out to be regular matter. The simplest solution is usually correct.

That's been clearly ruled out. It does all the things that dark matter doesn't, and there's not enough of it to explain mechanics on a galactic scale.
some regular intergalactic matter:
hydrogen, OH radicals, ammonia, water, formaldehyde, carbon monoxide, hydrogen cyanide, silicon monoxide, neutral hydrogen, H+ ions, helium, oxygen, carbon, nitrogen, magnesium, silicon, sulfur, formic acid, methane, vinyl cyanide, ethylene glycol, acetic acid, ethyl alcohol, glycoaldehyde , C6H-, dust, amino acids, chiral molecules, .... 32- heavy molecules in all.

[oil pan 4]

So dismissive. If it's been dismissed then as technology improves why do they find more and more of it?
If it's so certainthen why can't scientists find it with billion dollar dark matter detection experiments?
And when you say theres not enough matter toale the large scale structures that's where the magnetic fields come into play.

[Piotrsko]

Can't find something that isn't defined. I lost something at the beach, help me find it doesn't work well for 2nd parties doing the search.

Aerohead put it precisely. I fully expect Julian to say that's wrong.

[aerohead]

Originally Posted by oil pan 4

So dismissive. If it's been dismissed then as technology improves why do they find more and more of it?
If it's so certainthen why can't scientists find it with billion dollar dark matter detection experiments?
And when you say theres not enough matter toale the large scale structures that's where the magnetic fields come into play.

Are we still talking about 'regular matter?'
If so, it's ruled out for the reasons I've already mentioned.
Astronomers are using Hubble Space Telescope to carefully measure distortions of shapes of distant galaxies by gravitational lensing produced by dark matter.
They're creating all -sky maps of it's location.
Gravity affects light.
Gravity affects light cones coming from distant sources.
There are Eddington Coordinates which reveal how light cones vary with distance from a source of a gravitational field, creating map distortion, time delays, as predicted by Irving Shapiro in 1964.
The gravity of rotating bodies ( Parker Spiral ) has a twist, and nearby bodies are dragged around... and disturbances in the gravitational field travel through empty space as waves... ripples in spacetime, spacetime geometry.
Gravitational waves carry energy.
These waves are literally altering orbital periods of pulsars, validating the predictive capability Einstein's general relativity.
Energy and mass and time are all related.
Disturbances of light, radio, x-ray, gamma-ray, infrared, UV... all travel through empty space at the speed of light. Relativistic velocity.
Dark matter has a gravitosphere if you will. It produces tidal effects throughout the entire universe.
Science is mathematics. Cosmologists have only mathematical models with which to 'define' the universe.
Without microscopes, COVID-19 is just a 'theory'. No scientists ever 'saw' Covid with the naked eye. And Covid will kill millions without ever being 'seen'.
I can detect current in a live conductor with a clamp-on AMPROBE. I don't need to cut the insulation away and attempt to 'see' it.
We can 'detect' dark matter, without seeing it. It 'infects' and 'inflames' the light coming from distant sources.