The case against dark matter

Racist.

LINK

Dark matter is a theorized form of matter that is believed to account for approximately 80% of the matter in the universe, and about a quarter of its total energy density. The majority of dark matter is thought to be non-baryonic in nature, possibly being composed of some as-yet undiscovered subatomic particles.[note 1] Dark matter has not been directly observed, but its presence is implied in a variety of astrophysical observations, including gravitational effects that cannot be explained unless more matter is present than can be seen. For this reason, most experts believe dark matter to be ubiquitous in the universe and to have had a strong influence on its structure and evolution. The name dark matter refers to the fact that it does not appear to interact with observable electromagnetic radiation, such as light, and is thus invisible (or 'dark') to the entire electromagnetic spectrum, making it extremely difficult to detect using usual astronomical equipment.[1]

The primary evidence for dark matter is that calculations show that many galaxies would fly apart instead of rotating, or would not have formed or move as they do, if they did not contain a large amount of unseen matter.[2] Other lines of evidence include observations in gravitational lensing,[3] from the cosmic microwave background, from astronomical observations of the observable universe's current structure, from the formation and evolution of galaxies, from mass location during galactic collisions,[4] and from the motion of galaxies within galaxy clusters. In the standard Lambda-CDM model of cosmology, the total mass–energy of the universe contains 4.9% ordinary matter and energy, 26.8% dark matter and 68.3% of an unknown form of energy known as dark energy.[5][6][7][8] Thus, dark matter constitutes 84.5%[note 2] of total mass, while dark energy plus dark matter constitute 95.1% of total mass–energy content.

Gravity doesn’t "pull" though, it makes objects "fall" towards each other.


Or I guess really I should say gravity is the effect of objects falling towards each other, it’s caused by mass warping spacetime.

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Gravity doesn’t "pull" though, it makes objects "fall" towards each other.

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This is so wrong. You should be banned.

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Or I guess really I should say gravity is the effect of objects falling towards each other, it’s caused by mass warping spacetime.

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Nonsense. There is space and there is time but there is no spacetime.

Your explanation that it makes things fall together makes sense if you imagine the universe as if it’s a sheet of canvas and the sun is a bowling ball and the other planets are marbles but it really isn’t settled enough to describe it that simply. As far as I understand, it’s easy to demonstrate what we can observe through teaching it that way, but gravity acts much differently in reality.

This video does a good job of showing how the warping of space & time makes things "fall".

Wouldn’t that suggest that gravity is pulling the space, time, and light to distort it? None of those components (even as abstract as space and time are) contain matter, so what exactly is happening there?

Unless there’s an underlying fabric that exists throughout the empty gaps in the universe to exist as the canvas for the marbles to pull on each other, I don’t see how our current understanding of gravitational effects can be correct.

And don’t get me wrong, I’m not remotely smart enough to actually be discussing this. I just don’t see how current models and theories can explain the phenomena we’ve observed from gravity.

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You should be banned.

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We need a hero right meow.

:sadface:

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Would you mind putting this before every one of your posts. Thanks.

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No