• Fritz Zwicky and the Coma Cluster

  • Rotation Curve for the Solar System

  • Using the Doppler Effect to measure rotational speeds for a galaxy

  • Expected Rotation Curve for a Spiral Galaxy

  • Vera Rubin in 1960's and More Recently

  • Flat Rotation Curves for Spiral Galaxies

  • The Dark Matter Halo of a Spiral Galaxy

  • The Hot Intracluster Medium of gas

  • Gravitational Lensing by a Cluster of Galaxies

  • Two Colliding Clusters, "The Bullet Cluster"

  • A Cosmological Simulation of Dark Matter and Normal Matter (Gas) by EAGLE

  • The Standard Model (of Particle Physics) Matter Particles

  • There's not much room left for the WIMPs to hide!

  • Wikipedia Dark Matter Search

  • Possible Solutions for the Dark Matter Problem

  • Mordehai Milgrom and MOND

  • Predicted Rotation Curves for two Galaxies using MOND

  • . . . and a few more galaxies

  • MOND won't go away

  • Recent Results from MOND

  • The Acceleration of the Expansion of the Universe

  • Forrest Gump's Answer (if time)