Across
- 3. Diagram used to organize stars based on heat and luminosity.
- 6. Caused by the time of the month and the gravitational pull of the moon.
- 9. Form of waves used to identify and search through space.
- 10. A vast swirling mass of solar systems and other space objects.
- 11. Form of waves that travel incredibly long distances.
Down
- 1. Giant ball of heat and gas.
- 2. Moderate, Low-range tide that occurs during the first and third quarter moon phases.
- 4. A large cloud of space dust and other materials.
- 5. Area where stars spend most of their life.
- 7. Small set of planets or celestial objects, usually containing a star at the center.
- 8. Extremely high tide that occurs twice a month during the new and full moon phases.
- 9. The galaxy that we live in.