Across
- 1. Plants revolve around it and is made mainly of hydrogen and helium
- 5. Electromagnetic waves between radio and infrared waves in the electromagnetic spectrum
- 8. __ Waves-
- 10. __ Center-Rotational center of a galaxy
Down
- 1. The death of a large star by explosion
- 2. All matter space contains
- 3. A large cloud of dust in space
- 4. A large group of stars
- 6. ____-Shaped Galaxy-It has a bright center and little gas or dust
- 7. ___ of Light-How fast light travels
- 9. __ Arms-Area of stars that spread out from the center of a spiral galaxy