Contributions to _

• Two dark matter problems

  • Baryonic (from visible mass in galaxies to lower nucleosynthesis bound)
  • Non-baryonic (from upper bound to observed mass at large scale)

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Small scale - Oort M/L of 3 SunsM/L

Galaxy - M/L of ~30

Galaxy clusters - Zwicky gravitational lensing, Xray temps and direct motions of galaxies M/L ~500

Large scale - motion of galaxies, Hubble flow