Across
- 3. Scientific study of galaxies, stars, planets, and other objects in space
- 7. Imaginary lines on the Earth that run from north to south
- 9. Line of longitude where each calendar day begins
- 10. Imaginary lines on the Earth that run from west to east
- 11. First line of longitude
- 13. First day of spring and fall
Down
- 1. Line of latitude in the Northern Hemisphere
- 2. Turning or spinning on an axis
- 4. First day of winter and summer
- 5. Going around or orbiting another object
- 6. Imaginary line through the center of the Earth on which it rotates
- 8. Line of latitude in the Southern Hemisphere
- 12. First line of latitude