SPACE

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Across
  1. 2. off When a rocket or spacecraft begins its flight (7 letters)
  2. 4. board Present inside a vehicle, ship, or aircraft (7 letters)
  3. 7. Russian space traveler (10 letters)
  4. 8. Extremely pleased or happy (9 letters)
  5. 9. To go around something, like a planet goes around the sun (5 letters)
  6. 11. Jump from an aircraft and free-fall before opening a parachute (7 letters)
  7. 12. A celestial body orbiting a star, like Earth (6 letters)
Down
  1. 1. A unit of mass equal to 1,000 grams (8 letters)
  2. 3. Leader of a mission, often in space (9 letters)
  3. 5. A trip from one place to another (7 letters)
  4. 6. A man-made object that goes around a planet (9 letters)
  5. 10. A person trained to travel in a spacecraft (9 letters)