Across
- 4. Orbits our Earth and other planets.
- 7. Visible stars in our night sky forming figures.
- 8. A massive sphere of hot gas.
- 9. Orbits a star, is a spherical shape, and cleared it's path of orbit.
- 15. Life outside of our planet.
- 16. A collection of galaxies.
- 17. Our galaxy.
- 18. Doesn't meet the criteria to be a planet.
- 19. If you enter it, the gravity will be so great you will spaghettify.
Down
- 1. Group of planets and other objects that orbit a star.
- 2. Everything that exists.
- 3. The universal "speed limit."
- 5. A failed star.
- 6. There's many of them on the moon.
- 8. A star exploding.
- 10. Gases surrounding a planet and enveloping it.
- 11. Made up of dust, gas, stars and their solar systems.
- 12. A rock in space.
- 13. A cloud of gas and dust.
- 14. Matter An invisible substance that exerts gravity.