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Across 5. our own personal star 6. farthest planet from the un 7. spin on its axis 9. very old 12. instrument used to see things far away 14. closest planet to the sun 15. imaginary line on which the earth rotates

Down 1. how hot or cold something is 2. to move in a circular orbit 3. believed the sun and moon were brother and sister 4. another word for sun, where solar system comes from 5. ball of burning gasses, the sun is one 8. imaginary line that runs around the middle of the earth 10. large body that orbits a star, earth is one 11. the Greeks believed his helmet was what shone in the sky 13. path of one body around another