Across
- 2. huge collection of gas, dust, and billions of stars and their solar systems.
- 7. groupings of stars that form shapes of objects or creatures in the sky.
- 9. unit of length, roughly the distance from Earth to the Sun.
- 10. the process that powers the Sun and all other stars.
Down
- 1. stat that is fusing hydrogen to helium
- 3. giant cloud of dust and gas in space where stars are born.
- 4. combination of light wavelengths
- 5. brightness of a star or other celestial body
- 6. the distance light travels in one Earth year.
- 8. hot glowing ball of gases.