This is part of my complete intro Astronomy class that I taught at Willam Paterson University and CUNY Hunter. If you want to watch all the videos in the correct order, please visit my website at http://www.jasonkendall.com

The stars move in many ways. They are not fixed in the sky but changes slowly over the centuries.

Proper Motion: https://en.wikipedia.org/wiki/Proper_...
Radial Velocity: https://en.wikipedia.org/wiki/Radial_...
Space Velocity: https://en.wikipedia.org/wiki/Stellar...
Parallax: https://en.wikipedia.org/wiki/Parallax
Barnard's Star: https://en.wikipedia.org/wiki/Barnard...
The Hyades: https://en.wikipedia.org/wiki/Hyades_...)
Dark Matter from Galaxy Rotation Curves: https://en.wikipedia.org/wiki/Galaxy_...
Jack Schmidling's view of Barnard's Star: http://schmidling.com/barnard.htm
Radar Mapping of Venus: http://mentallandscape.com/V_RadarMap...