6th grade vocabulary week 21

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Across
  1. 5. the layer of gas surrounding a planet
  2. 8. a group of stars that form a shape
  3. 9. a limited extent in one, two or three dimensions
  4. 12. a celestial body orbiting another of larger size.
  5. 13. a natural luminous body visible in the sky specially at night.
  6. 14. the Earth only natural satellite
Down
  1. 1. any of the seven celestial bodies.
  2. 2. the Sun together with the group of celestial bodies
  3. 3. a small moving solid object orbiting the Sun
  4. 4. the whole body of things and phenomena observed or postulated
  5. 6. a body with a frozen nucleous that travel around the sun.
  6. 7. a small rocky objects that revolves around the Sun
  7. 9. the luminous celestial body around which the Earth and other planets revolve
  8. 10. the scientific study of the planets, stars and galaxies and the universe as a whole.
  9. 11. the vast spiral arrangement of stars