Galactic Rotation Curve

• warmup: solar system rotation curves here, here, and here
• Milky Way rotation curve: data
• Milky Way rotation curve: interpretations

Milky Way Dark Matter

• What the heck is it?!?
• what it is not
• favorite candidate today: exotic relic particles
  underground detection experiment

Galaxies

• Types:
  
  • Spiral: ongoing star formation
  • Barred spiral, star formation in barred sprial
  • Elliptical
  • Irregular: Sextans A, LMC, SMC
  • colliding/merging galaxies
    

  ---

  Changing Gears: The Big Picture

  ---

  Cosmology

  Where are the Galaxies: Structure of the Universe

  • cosmological principle: homogeneous & isotropic
  • actual data: 2dF Galaxy Redshift Survey
    • survey geometry
    • results in 3-D

  Galaxy Motion Relative to Us

  • Hubble's law
  • Hubble motion: artist's conception

  ---

  OBAFGKM(LT) Contest: Winners