8 ms·

There isn’t one dark matter theory there are many candidates none of them are exactly implausible or impossible. We can’t account for the mass of the universe

There isn’t one dark matter theory there are many candidates none of them are exactly implausible or impossible. We can’t account for the mass of the universe so we are looking for it. There are two options either there is mass that we cannot detect through non-gravitational related observations or that we don’t understand gravity on a macro level which also puts relativity at odds. MOND was pretty much killed last year and it’s now completely off the books so modifying Newtonian gravity to fit in our understanding of the universe won’t work, which leaves dark matter which is again a place holder name for one or more types of matter that are very hard to observe. It can be wimps or it can be that there are a lot more brown dwarfs, rogue planets, and other bodily objects that we can’t see.

Avshalom 8y ago
I don't really follow astrophysics anymore was there anything specific last year that happened? (not that various mond's were ever particularly viable)
- dogma1138 8y ago
  Gravitational waves specifically from the colliding neutron stars which were observed in “real time” in 2017 which arrived at the same time as the light emitted from the collision pretty much killed it.
  - Avshalom 8y ago
    Oh that's right! I didn't even think about that but yeah gravity detection is absolutely a line of evidence for/against Monday (against in this case)
    - cperciva 8y ago
      I don't think we need to look for evidence for or against the existence of Monday...
      - kjeetgill 8y ago
        I think it's a reference to "Last Thursdayism"? > Last Thursdayism (alternately Last Tuesdayism! or Last Wednesdayism) is the idea that the universe was created last Thursday, but with the physical appearance of being billions of years old. https://rationalwiki.org/wiki/Last_Thursdayism https://rationalwiki.org/wiki/Last_Thursdayism
  - nonbel 8y ago
    Would it affect your opinion if the light emitted was noticed first by another project, who then told the gravitational wave people about it, at which point they found data their algorithms had previously rejected as noise and changed the classification to be a signal?
    - pwned1 8y ago
      Yikes!
      - nonbel 8y ago
        I don't know if its "yikes". But we are still waiting for them to detect something first and prove it is real by pointing where to look. I mean if you were waiting for that kind of evidence to begin with.
        davidcuddeback 8y ago
        > But we are still waiting for them to detect something first and prove it is real by pointing where to look. That's exactly what happened with last year's neutron star merger. It was detected as GRB and GW, localized based off of the GW data, and then an observing campaign found a transient at the predicted location in visible light, IR, UV, radio, and X-ray.
    - davidcuddeback 8y ago
      It was actually detected by two gravitational wave facilities (Hanford and Livingston) before the GRB was detected by Fermi. What you're referring to is that the gravitational wave was in a third facility's blind spot (Virgo). So yes, they had to dig it out of Virgo's data to triangulate the location of the signal so that they could confirm the event in optical wavelengths (which they did). No, that doesn't affect my opinion, because your characterization is inaccurate. It was in fact detected independently as a GW and a GWB.
      - nonbel 8y ago
mpc755 8y ago
Dark matter is a supersolid that fills 'empty' space, strongly interacts with visible matter and is displaced by visible matter. What is referred to geometrically as curved spacetime physically exists in nature as the state of displacement of the supersolid dark matter. The state of displacement of the supersolid dark matter is gravity. There is evidence of the supersolid dark matter every time a double-slit experiment is performed, as it is the supersolid dark matter that waves. Supersolid dark matter ripples when galaxy clusters collide and waves in a double-slit experiment, relating general relativity and quantum mechanics.

Avshalom 8y ago

I don't really follow astrophysics anymore was there anything specific last year that happened? (not that various mond's were ever particularly viable)

dogma1138 8y ago
Gravitational waves specifically from the colliding neutron stars which were observed in “real time” in 2017 which arrived at the same time as the light emitted from the collision pretty much killed it.
- Avshalom 8y ago
  Oh that's right! I didn't even think about that but yeah gravity detection is absolutely a line of evidence for/against Monday (against in this case)
  - cperciva 8y ago
    I don't think we need to look for evidence for or against the existence of Monday...
    - kjeetgill 8y ago
      I think it's a reference to "Last Thursdayism"? > Last Thursdayism (alternately Last Tuesdayism! or Last Wednesdayism) is the idea that the universe was created last Thursday, but with the physical appearance of being billions of years old. https://rationalwiki.org/wiki/Last_Thursdayism https://rationalwiki.org/wiki/Last_Thursdayism
- nonbel 8y ago
  Would it affect your opinion if the light emitted was noticed first by another project, who then told the gravitational wave people about it, at which point they found data their algorithms had previously rejected as noise and changed the classification to be a signal?
  - pwned1 8y ago
    Yikes!
    - nonbel 8y ago
      I don't know if its "yikes". But we are still waiting for them to detect something first and prove it is real by pointing where to look. I mean if you were waiting for that kind of evidence to begin with.
      - davidcuddeback 8y ago
        > But we are still waiting for them to detect something first and prove it is real by pointing where to look. That's exactly what happened with last year's neutron star merger. It was detected as GRB and GW, localized based off of the GW data, and then an observing campaign found a transient at the predicted location in visible light, IR, UV, radio, and X-ray.
  - davidcuddeback 8y ago
    It was actually detected by two gravitational wave facilities (Hanford and Livingston) before the GRB was detected by Fermi. What you're referring to is that the gravitational wave was in a third facility's blind spot (Virgo). So yes, they had to dig it out of Virgo's data to triangulate the location of the signal so that they could confirm the event in optical wavelengths (which they did). No, that doesn't affect my opinion, because your characterization is inaccurate. It was in fact detected independently as a GW and a GWB.
    - nonbel 8y ago

mpc755 8y ago

Dark matter is a supersolid that fills 'empty' space, strongly interacts with visible matter and is displaced by visible matter. What is referred to geometrically as curved spacetime physically exists in nature as the state of displacement of the supersolid dark matter. The state of displacement of the supersolid dark matter is gravity. There is evidence of the supersolid dark matter every time a double-slit experiment is performed, as it is the supersolid dark matter that waves. Supersolid dark matter ripples when galaxy clusters collide and waves in a double-slit experiment, relating general relativity and quantum mechanics.