Space Crossword

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Across
  1. 2. - The hottest planet in the solar system
  2. 6. - The apparent shift of an object when viewed from different positions
  3. 8. - A volcano that erupts water, ammonia, or methane instead of lava
  4. 10. - What astronauts do on the lunar surface
Down
  1. 1. - The distance light travels in one year
  2. 3. - A planet outside our solar system
  3. 4. WIND - Particles emitted by the sun
  4. 5. MATTER - The unseen mass that makes up most of the universe
  5. 7. - A being from another planet
  6. 9. - A space void of matter