File	Title	Manuscript Id
Chapter 13. Orbits of the Galilean Moons	astro_tutorial_ch13_orbits_of_the_galilean_moons.html	51cdf93cb62f8b1d17000007
DLAP questions	astro_tutorial_ch13_orbits_of_the_galilean_moons_dlap.xml	51cdf93cb62f8b1d17000007