Across
- 3. Leftover energy from the Big Bang
- 5. A celestial body made up of hot gasses that gives off energy because of nuclear fusion
- 8. A galaxy that has a generally elliptical shape and that has no apparent internal structure or spiral arms
- 10. an invisible form of energy that creates a repulsive force causing the universe to expand
- 11. all of space and everything in it including stars, planets, and galaxies
Down
- 1. change in the apparent frequency of a wave as observer and source move toward or away from each other
- 2. A collection of gas and dust from which stars form.
- 4. a galaxy exhibiting a central nucleus from which extend curved arms of higher luminosity
- 6. A collection of billions of stars held together by gravity
- 7. What is the name and shape of our galaxy?
- 9. a galaxy with no identifiable shape or structure