3 ms·

Dark energy especially so, I think. I do agree with you somewhat, but dark matter at least is not so preposterous, simply being matter that only interacts with

• J3L2404 15y ago
  Yes, I think you have a point. Galaxy rotation is going to be hard explain without some missing mass.
  • dgottlieb 15y ago
    Now I'm merely trying to raise awareness, not offer an argument, but there are alternate gravitational theories for galaxy rotation (that I believe are more elegant, but at the expense of breaking more things than it fixes) such as MOND. http://en.wikipedia.org/wiki/Modified_Newtonian_Dynamics http://en.wikipedia.org/wiki/Modified_Newtonian_Dynamics Dark matter being less elegant in the galaxy rotation problem being a) it hasn't been detected and b) if it does exist, why does it fall into the same halo distribution pattern in different galaxies to account for the same rotational observation of these aforementioned spiral galaxies. But as I said before, MOND seems to break more physics than it solves, but much smarter people that actually work in physics are trying to put those pieces together which makes it legitimate enough for me to take seriously. Edit: Actually reading who's responding to what, I learned you're more than well aware of this :) I like to believe that galaxy rotation is solved with a single theory and not a significant combination of explanations (Occam's Razor). In any event I'll leave this comment here as an awareness booster for younger dabbling cosmologists.