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In astronomy and cosmology, 1 and 5 are the same number. Only the orders of magnitude matter when talking about large things. At atomic scales and in photon len

In astronomy and cosmology, 1 and 5 are the same number. Only the orders of magnitude matter when talking about large things. At atomic scales and in photon length the precise numbers do matter.

PaulHoule 3y ago
… if dark matter is something totally different from light matter there might be 1000x more of it.
- neltnerb 3y ago
  They're describing relative mass, which is related to gravitational attraction and inertia, whether there is "more" is not something they measured. What is "more"?
  - PaulHoule 3y ago
    Total mass as measured by gravitation effect.
almostnormal 3y ago
> In astronomy and cosmology, 1 and 5 are the same number. Only the orders of magnitude matter when talking about large things. At atomic scales and in photon length the precise numbers do matter. "I am not interested in a more accurate value." said no scientist ever. It's just easier to measure small things using big tools than to measure big things using small tools, hence astronomy has a disadvantage. Another one is that it isn't easy to create any experiments.