Across
- 3. holds together stars
- 5. atoms collide to form new elements and give off energy during _______ fusion
- 7. cloud of gas and dust
Down
- 1. the sun fuses ______ to form Helium
- 2. the ______ sequence is where stars are going through nuclear fusion
- 4. the beginning stages of a star's life
- 6. where fusion happens in the sun