Across
- 4. An oval or egg shaped galaxy with older stars and little gas and dust.
- 6. when waves of energy are stretched due to objects moving apart from each other, decreased pitch & wave frequency, increased wavelength
- 8. portion of the electromagnetic spectrum
- 10. A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity.
Down
- 1. when waves of energy are compressed due to objects moving towards each other,
- 2. change in wavelength of energy due to movement toward or away from another object
- 3. the name of our galaxy, a spiral galaxy that contains about 400 billion stars
- 5. produce or discharge
- 7. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern.
- 9. cloud of gas & dust. spark or change causes gravity to take over and start process of new star birth.