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DARK MATTER

DARK MATTER. What is Dark Matter?. Not “not-bright” matter Makes up ~85-90% of the mass in the universe W eakly I nteracting M assive P articles DM only talks to itself and normal matter via gravity So how do we know its there?…. Rotation Curves.

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DARK MATTER

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  1. DARK MATTER

  2. What is Dark Matter? • Not “not-bright” matter • Makes up ~85-90% of the mass in the universe • Weakly Interacting Massive Particles • DM only talks to itself and normal matter via gravity • So how do we know its there?…

  3. Rotation Curves • Use the circular velocity of stars to measure the mass inside

  4. Other Galaxies Have Dark Matter

  5. Other Galaxies Have Dark Matter

  6. Other Galaxies Have Dark Matter

  7. Our Galaxy Has Dark Matter

  8. COLLIDING GALAXIES

  9. Spiral…

  10. A Mess…

  11. A Mess… Grow a supermassive Black hole at the center

  12. … to Elliptical

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