space

1. Fifth planet
3. A very bright meteor.
5. Planet we leave on
6. The world or universe seen as an orderly harmonious system
9. An oval shape. Johannes Kepler discovered the orbits of planets are elliptical in shape and not circular.
11. Beyond the sun
14. Any of various group of stars to which define names have been given
15. Space between the galaxies.
17. The outermost geological thin layer of an asteroid, moon, or planet.
19. Small galaxy that contain a few million stars, it is the most common kind of galaxy in the universe.
20. Eighth planet
21. The science that deals with the material universe beyond the earth's atmosphere
24. Planets made primarily of gas, these include Jupiter, Saturn, Uranus, and Neptune.
25. Second planet

2. Seventh planet
4. Massive object found at the beginning of the universe
7. Fourth planet
8. One millionth of a meter.
10. Curved path an object follows around a bigger object or a common center of mass
12. Smaller body orbiting a larger body
13. The region in space between the orbits of Mars and Jupiter where most asteroids are located
16. First planet
18. Hot gas held together by gravity
22. Sixth planet
23. An enormous gravitationally bound assemblage of million or billions stars
25. Empty space found in the galaxy