Planets

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Across
  1. 1. Finding planets by measuring a star’s wobble
  2. 3. Planets that orbit stars outside our solar system
  3. 4. Giant gas planets extremely close to their stars
  4. 6. Region around a star where liquid water can exist
  5. 8. System with seven Earth-sized planets
  6. 10. Studying light to identify chemicals
  7. 11. Distance that light travels in one year
  8. 12. Chemical signals that could indicate life
Down
  1. 2. Detecting planets by a star’s slight dimming
  2. 5. Rocky planets larger than Earth
  3. 7. A planet’s shell of gases
  4. 9. Life that may exist beyond Earth