The document defines basic vocabulary related to the Solar System, including terms like universe, galaxy, Milky Way, Solar System, Sun, planets which are divided into inner planets like Mercury, Venus, Earth, Mars and outer planets like Jupiter, Saturn, Uranus, Neptune. It also mentions dwarf planets like Pluto and other celestial bodies such as comets, asteroids, and satellites, and describes their rotational and translational movements as well as elliptical orbits around the Sun.

1. The Solar System
Basic vocabulary

2. Universe

3. galaxy

4. Milky Way

5. Solar System

6. Sun

7. Planets

8. Inner planets

9. Mercury

10. Venus

11. Earth

12. Mars

13. Outer planets

14. Jupiter

15. Saturn

16. Uranus

17. Neptune

18. Dwarf planets

19. Pluto

20. celestial bodies

21. comet

22. asteroids

23. satellite

24. rotation movement

25. translation movement

26. elleptical orbits

27. MMRB