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Across 1. shape of Mercury's orbit 5. daytime temperature on Mercury 6. rocky crust looks like wrinkles 8. 58.5 days equals a 9. number of days to orbit the sun 10. spacecraft orbiting Mercury 12. At night Mercury does not have any 13. there is no wind or weather or this 15. messenger for the other gods or the closest planet to the sun 16. Mercury does not have these because of no tilt

Down 2. space rocks responsible for craters on Mercury 3. type of core that Mercury has 4. Mercury has less of this than the Earth 7. type of H-two-Oh on Mercury 11. surface is very similar to our moon 14. Mercury is essentially a large metal ball of this