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[Unknown Title]universe10e_ch22_1.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_1_dlap.xml534c6bf8757a2e4a30000002
22-1 The Sun is located in the disk of our Galaxy, about 8000 parsecs from the galactic center universe10e_ch22_2.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_2_dlap.xml534c6bf8757a2e4a30000002
22-2 Observations at nonvisible wavelengths reveal the shape of the Galaxy universe10e_ch22_3.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_3_dlap.xml534c6bf8757a2e4a30000002
22-3 Observations of cold hydrogen clouds and star-forming regions reveal that our Galaxy has spiral arms universe10e_ch22_4.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_4_dlap.xml534c6bf8757a2e4a30000002
22-4 The rotation of our Galaxy reveals the presence of dark matter universe10e_ch22_5.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_5_dlap.xml534c6bf8757a2e4a30000002
22-5 Spiral arms are caused by density waves that sweep around the Galaxy universe10e_ch22_6.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_6_dlap.xml534c6bf8757a2e4a30000002
22-6 Infrared, radio, X-ray, and gamma-ray observations are used to probe the galactic center universe10e_ch22_7.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_7_dlap.xml534c6bf8757a2e4a30000002
Key Wordsuniverse10e_ch22_8.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_8_dlap.xml534c6bf8757a2e4a30000002
Key Ideasuniverse10e_ch22_9.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_9_dlap.xml534c6bf8757a2e4a30000002
Questionsuniverse10e_ch22_10.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_10_dlap.xml534c6bf8757a2e4a30000002
Activitiesuniverse10e_ch22_11.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_11_dlap.xml534c6bf8757a2e4a30000002
Answersuniverse10e_ch22_12.html534c6bf8757a2e4a30000002
DLAP questionsuniverse10e_ch22_12_dlap.xml534c6bf8757a2e4a30000002