Across
- 2. A highly luminous star that is larger and more massive than a giant
- 4. Bright cores of galaxies that have a black hole at the center consuming the matter
- 6. a developing star where no nuclear fusion is happening yet
- 7. an astronomical distance equal to the distance light can travel in one year, 6.5 Trillion Miles
- 10. how much light is actually given off by a star
- 11. galaxy that looks normal to the naked eye, but emit more infrared radiation than a normal galaxy
- 12. Hydrogen becomes helium in a continuous nuclear reaction
- 13. a celestial body composed of hot gasses that radiate energy, including light and heat
- 14. a small, dense, hot, faint star
- 16. The band of colors produced when light passes through a prism that splits white light into its separate components
- 17. a graphical plot that shows the relationship between a star’s luminosity and surface temperature
- 18. clouds of dust and gas
Down
- 1. a star that is in the stable middle stage of development
- 2. produce their own light
- 3. a high luminous, exceptionally massive star
- 5. how bright a star appears to be from earth due to its distance
- 8. a cluster of billions of stars held together by gravity
- 9. the mass of our sun
- 15. galaxy that emits radio wavelengths instead of light so they are driven by non-thermal emissions