Across
- 4. A grouping of millions or billions of stars,gas, and dust, held together by gravity
- 5. A distinctive star grouping that is not one of the 88 recognized constellations
- 7. Enormous explosion that marks the death of a massive star
- 8. Space model with the sun in the center
- 9. A big change in the frequency of sound, light, and other waves
Down
- 1. Telescopes that are used to observe the cosmos with the use of lenses
- 2. Used to measure the spectrum of a star.
- 3. Object around which gravity is very intense
- 5. The height of a celestial body above the horizon, ranging from 0 at sea level to 90° straight up
- 6. Space model with earth in the center