http://digfir-published.macmillanusa.com/astro_tutorial/astro_tutorial_ch14_discovering_planets.html
Chapter
14. Discovering Planets
51d35904b62f8b7522000014
http://digfir-published.macmillanusa.com/astro_tutorial/astro_tutorial_ch14_discovering_planets_dlap.xmlDLAP questions51d35904b62f8b7522000014