Across
- 4. The distance between any two corresponding points that are adjacent on a wave
- 5. Radiation consisting of electric and magnetic waves that travel at the speed of light
- 9. How fast light travels,300,000km/sec
- 10. Used in astronomy as a standard unit to compare the size of other stars with our sun
- 12. Areas of stars that spread out from the center of a spiral galaxy
- 14. All space and the matter space contains
- 15. Large cloud of gas and dust in interstellar space;the location of star formation
- 16. Rotational center of a huge galaxy such as the Milky Way Galaxy
- 17. An object with more than four solar masses sqeezed into a ball only 10 km across whose gravity is so strong that even light can not escape
- 18. Electromagnetic waves that are very high energy and are used in medical and astronomical applications
Down
- 1. Vast arrangement of electromagnetic waves in relation to their wavelengths
- 2. A representation of an object that is accurate in its proportions to the actual object
- 3. Provide us with visible light spectrum,the colors we see
- 5. A galaxy with a bright center and very little dust or gas
- 6. Electromagnet waves with longer wavelengths than visible light
- 7. Electromagnetic waves with long wavelengths and low frequencies
- 8. Bands of dust that appear as dark ribbons against the bright stars in a galaxy
- 11. A large grouping of stars in space
- 13. The death of a large star by explosion