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Is this really science?
The observed universe stopped fitting the model of gravity, so we made dark matter because the model couldn’t possibly be wrong.
“So how dense is dark matter?”, “it’s whatever you need it to be.”, “Omg that’s awesome!”
- D gLv 72 months ago
omg really you expect someone here to teach you something as complex as that ... gravity didnt fail
what happens is the universe is expanding at a faster rate this people dont understand unless there is something they cant see pulling it or providing another force
- Anonymous2 months ago
That's exactly what science is, coming up with explanations for stuff that doesn't match up with what they think they understand, and testing those explanations until they're satisfied with the answer.
"Dark matter" is a placeholder for the real answer, which is either going to be new understandings of matter or that the math was wrong in the first place.
- 2 months ago
We didn't "make" dark matter to continue to propagate our current theories!
Dark matter actually explains more than previously known AND STANDS UP to scrutiny!
It is not a simplistic concept as your puerile and half baked question implies.
- Anonymous2 months ago
Most of the Universe's weight is made of the 50 shades of gray matter.
- Bulldog reduxLv 72 months ago
No one "made dark matter" any more than anyone made ordinary matter or dark energy or lunar craters. Dark matter was first proposed as the most probable explanation for the observed high rotational speed of galaxies (Vera Rubin was the astronomer).
- SciencenutLv 72 months ago
Dark matter is a proposed theory that was put forth to explain why spiral galaxies are rotating more like solid disks, rather than by straight Newtonian laws of gravitation. In other words, could you please explain to us why Mercury, Earth, Jupiter, and Neptune all make one complete orbit of the Sun in just one year?
Please tell us your preferred explanation.
- nineteenthlyLv 72 months ago
Yes, I know exactly what you mean and that's why I don't believe in exotic dark matter. However, I do believe it's possible that there's enough baryonic dark matter to explain it, or that MoND might.
- Jeffrey KLv 72 months ago
Yes, that is what scientists did. Either our theory of gravity is wrong or something unseen is producing more gravity. Since Newton's Law of gravity and general Relativity have worked everywhere else, scientists would rather believe in unseen mass rather than believe the laws of gravity are wrong.
Of course, those scientists could be wrong.
- nebLv 72 months ago
Every test of Einstein’s general relativity has verified its description of gravity completely. That is the reason why physicists are loathe to toss out general relativity and why they propose dark matter as an alternate explanation.
Various modifications of both Newton’s gravity (MOND theories) and general relativity (tensor-vector-scalar theories -TeVeS ) have been used to try to do away with dark matter. None have been successful, and all have the serious flaw of being ad hoc - the so called interpolating function in MOND theories that is tweaked to match observation and in the TeVeS mods the Einstein-Hilbert action in the general relativity Lagrangian has addition vector and scalar terms that are tweaked. There seems to be no physical justification for these ad hoc terms, unlike the beautiful logical flow of general relativity.
And there are lots of reasonable candidates for dark matter that are simply weakly interacting particles similar to neutrinos. Sterile neutrinos, axions, and WIMPS all have at least a plausible theoretical basis.
Also keep in mind that we didn’t detect the Higgs boson for nearly 50 years after it’s theoretical proposal. We simply didn’t have the technology to find it.
And lastly, we have detected zero curvature in the universe so that the universe appears to be at the critical energy density for overall ‘flatness’. The amount of visible matter is far too small to explain that.
- billrussell42Lv 72 months ago
the observed rotation rate of galaxies does not fit the models formulated with gravity forces. Dark matter was then postulated so that the rotation rates made sense.