Across
- 1. The luminous celestial body around which the Earth and other planets revolve;composed mainly of hydrogen and helium
- 3. Large cloud of gas and dust in interstellar space;the location of star formation
- 5. A large grouping of stars in space
- 9. Galaxy A galaxy with a bright center and very little dust or gas
- 13. How fast light travels 300,000km/sec
- 14. All space and the matter space contains
- 15. Mass Used in astronomy as a standard unit to compare the size of other stars with our Sun
- 16. Model a representaion of an object that is accurate in its proportions to the actual object
Down
- 1. Arms Areas of stars that spread out from the center of a spiral galaxy
- 2. Galaxy Galaxy with a central bulge or bar wuth short arms, if any are present
- 4. The death of a large star by explosion
- 6. Beginning point at which something begins, or from which it derives
- 7. Way Galaxy The huge grouping of stars that rotate around a center of which the Sun and the solar system are a part
- 8. Rotational center of a huge galaxy such as the milky Way Galaxy
- 10. of dust that appear as dark ribbons against the bright stars in a galaxy
- 11. Waves Electromagnet waves with longer wavelengths than visible light
- 12. A self-luminous celestial body consisting of a mass of gas held together by it's own gravity in which the energy is generated by nuclear reactions in it's interior