Across
- 2. the coolest stars are this color
- 4. the process of hydrogen fusing together to make helium that gives us energy from the sun
- 6. the hottest stars are this color
- 7. a baby star or the first stage of a stars life
- 8. our star is about 10 _________ years old
- 9. the end of a very large stars life
Down
- 1. a large cloud of gas and dust in space
- 3. the HR diagram measures a stars luminosity and this
- 5. the brightest stars with the shortest lives