Across
- 1. Rotational center of a huge galaxy such as the milky way galaxy
- 4. Areas of star that spread out fro the center of a spiral galaxy
- 6. A galaxy with a bright center and very little dust or gas
- 9. The death of a large star by explosion
- 10. The transfer of energy through matter or space as electromagnetic waves, such as visible light and infared
- 11. Large cloud of gas and dust in interstellar space
- 12. a galaxy that dose not fit into any category; a galaxy with very little symmetry
- 16. How fast light travels 300,000km/sec
- 17. All space and the matter space contains
- 19. Bands of dust that appear as dark ribbons against the brights stars in a galaxy
- 20. The huge grouping of stars that rotate around a center of which the sun and the solar system are a part
Down
- 2. Galaxy with a central bulge or bar with short arms, if any are present
- 3. Provide us with visible light spectrum, the colors we see
- 4. The luminous celestial body around which the earth and other planets revolve; composed mainly of hydrogen and helium
- 5. A representation of an object that is accurate in its proportion to the actual object
- 6. Radiation consisting of electric and magnetic waves, that travel at the speed of light
- 7. A self-luminous celestial body consisting of a mass of gas held together by its own gravity
- 8. Used in astronomy as a student unit to compare the size of other stars with our sun
- 13. Electromagnetic waves with long wavelengths and low frequencies
- 14. A large grouping of stars in space
- 15. A galaxy with bulge in the center and very distinct long arms winding around the center
- 18. An object with more than four solar masses squeezed into a ball only 10 km across whose gravity is so strong that even lights can not escape