ASTROID. <Dark Matter>. Lesson Plan Guided Research Model Dr. Christian Reimers email@example.com http://www.virtuelleschule.at/cosmos/. . .  Gravitational Lens, HST observation of Abell 2218  Rotation curve (observed and theoretical), SuW 1/2005 S.32ff.
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- confusing types of matter
- visible parts of galaxies are dominant
 HST observation of M51 „Whirlpool Galaxy“  HST observation of M104 „Sombrero Galaxy“
 Doppler image of M33
 Illustration of the galaxies rotation (Sextans A)
 Interactive Applet on the Doppler effect
 Work sheet: Kepler rotation in the Solar System
 „rotcurve“-Applet of real galaxieshttp://burro.cwru.edu/JavaLab/RotcurveWeb/main.html
 Multiple-Choice-Test (ASTROID)