Scale Heights
disk heating
Stellar Kinematics
Question: How do we measure the sun's peculiar velocity?
Solar Motion, LSR, Kinematics
Disk and thick Disk Kinematics
Velocity-Ellipsoids
Points, asymmetric Drift, Thick Disk
Orbits and Epicycles
The orbits of the stars
Orbits of disk stars: epicycles
More epicycles
Disk Dynamics and Spiral Structure
Properties of spiral arms
M81 spiral structure
The Winding Problem
Pitch angle and geometry
Spiral Density Waves
Important points
Setting up orbits
Where do we run into problems?
Seeding the Problem
