New measurements of the sky's blackness show galaxies only number in the hundreds of billions. How dark is the sky, and what does that tell us about the number of galaxies in the visible universe? Astronomers can estimate the total number of galaxies by counting everything visible in a Hubble deep
  • poVoq@lemmy.ml
    2·
    4 years ago

    Hmm, that makes the dark matter/energy stuff even more vexing. I really hope we will come up with a more satisfying explanation in my life time…

    • RumblestiltskinOP
      1·
      4 years ago

      Does the existence of far off galaxies affect the calculations of dark matter? I thought we noticed dark matter from orbits. I would assume it would be hard to detect how far off galaxies affect orbits in our galaxy or even solar system.

      • poVoq@lemmy.ml
        2·
        4 years ago

        Not an expert on it, but I thought the overall estimation of the amount of dark-matter also depends on the amount of non-dark matter observed, but IDK.