Galaxy

2. the star at the center of the Solar System
5. the third planet from the Sun
6. the sixth planet from the Sun and the second largest planet in the Solar System
8. the smallest and closest to the Sun
11. the fifth planet from the Sun and the largest planet in the Solar System
14. a hot star with a luminosity class of III
15. an astronomical object orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity
16. the galaxy that contains our Solar System
17. known as a shooting star
18. the eighth and farthest planet from the Sun in the Solar System
20. the second planet from the Sun

1. Dwarf a stellar remnant composed mostly of electron-degenerate matter
3. the seventh planet from the Sun
4. the fourth planet from the Sun
7. the gravitationally curved path of an object around a point in space
9. a luminous giant star of low or intermediate mass
10. a sudden, complete or marked change in something
12. circular movement of an object around a center (or point) of rotation
13. a massive, gravitationally bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust
19. the second-most-massive known dwarf planet in the Solar System