Outer Space

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