File	Title	Manuscript Id
Chapter 23. Our Location in the Milky Way Galaxy	astro_tutorial_ch23_our_location_in_the_milky_way_galaxy.html	51c11543b62f8b0625000008
DLAP questions	astro_tutorial_ch23_our_location_in_the_milky_way_galaxy_dlap.xml	51c11543b62f8b0625000008