Across
- 4. a group of galaxies that are found close together
- 7. a star plotted in the left-to-right band across the HR diagram
- 10. the collection of all the matter, space and energy that exists, also known as the cosmos
- 12. an older star with a cooler outer layer
- 13. stellar core remnant of a low to medium mass star
Down
- 1. the tightly-packed collapses core of a larger star
- 2. the largest structure in the universe, composed of many galaxy clusters
- 3. a gravitationally dense region of space-time where nothing can escape, not even light
- 5. a massive, hot, shining ball of gas
- 6. clouds of dust and gas found in space
- 8. a large, hot star off the main sequence
- 9. a body held together by gravity that is made of millions of stars, gas, and dust
- 11. a cool, small star on the main sequence