1. Constellation
Cluster or group of stars that seem to form shapes or patterns
88 officially recognized groupings
Used for 1000s of years as calendars, timekeepers and direction finders
Seen as shapes of animals, mythical gods, etc., and given a variety of names
Horoscope signs are constellations (e.g. Virgo)
e.g. Ursa Major Constellation (Great Bear)

2. Asterism A distinctive star pattern
Refers to unofficially recognized groupings of stars
e.g. the Big Dipper, Little Dipper

3. Big Dipper

4. Ursa Major

5. Ursa Major

6. Big Dipper + Little Dipper

7. Ursa Minor

8. Ursa Minor

9. Cassiopeia

10. Cassiopeia

11. Cassiopeia

12. Hercules

13. Hercules

14. Hercules

15. Orion

16. Orion

17. Orion

19. Planet Sizes and Order

20. The Planets

21. Inner Solar System

22. Outer Solar System

23. Solar System Now