Across
- 5. The amount of energy (light) a star emits
- 8. Layer of the Earth's atmosphere above the photosphere
- 9. High energy, violent bursts and interruptions
Down
- 1. A group of between 1 million and 1 trillion stars
- 2. The size of a star
- 3. Black spots on the sun's photosphere that are cooler and magnetic
- 4. A group of stars that ancient people thought formed a picture in the sky
- 6. An object in space that produces its own heat and light
- 7. The outer layer of the Earth's photosphere