THE UNIVERSE

1. Milky way (via lactea)

1.1. 1. What type of galaxy is our galaxy?

1.1.1. 2. Where are we located in the galaxy?

1.2. 2. Where are we located in the galaxy

1.3. 3. How old is our galaxy? How do we know?

1.4. http://www.windows2universe.org/kids_space/milky_way_ask.html

2. Origin of the solar system, its place in the universe

3. The earth and the moon

3.1.  Moon

3.2. Full Moon

3.3. Quarter Moon

3.4. New Moon

3.5. Phases

3.6. Waxing

3.7. Waning

3.8. Gibbous

3.9. Crescent

3.10. Lunar

3.11. Lunar Eclipse

4. Space research on the human service