Across
- 2. solid refractory pieces of individual presolar stars
- 3. balls of hot, explosive gas that make their own light and heat energy
- 4. one of the most abundant elements in the universe
- 5. the large round object that circles the Earth.
- 6. a huge collection of gas, dust, and billions of stars
Down
- 1. large natural objects that orbit, or travel around, stars
- 3. the colossal explosion of a star