Across
- 3. a huge assemblage of stars, interstellar galaxies, and dust
- 6. masses of water, methane, and ice
- 7. when chemical elements are heated, they too produce spectra
- 9. sun centered the solar system
- 10. consists of the sun, planets, asteroids, comets, and moons
Down
- 1. hypothetical form of energy that exerts a negative, repulsive pressure
- 2. earth centered the solar system
- 4. small rocky bodies that orbit the sun
- 5. relatively small piece of debris chipped off asteroids or comets
- 8. the unit from earth to the sun