Astronomy

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Across
  1. 2. visible in the sky especially at night.
  2. 6. A place full of gases protecting the earth.
  3. 7. Rising or falling of the sea.
  4. 9. Helps us stand on the ground.
  5. 10. Gives us natural light at night.
Down
  1. 1. An regular oval shape.
  2. 3. 23.5 degrees.
  3. 4. An object motion around another object.
  4. 5. A curved path for a celestial body.
  5. 8. when day and night are almost equal.