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Across 1. cannot just fly into outterspace 5. is the force that pulls objects toward the center of the Earth 6. usually have more gravity 7. this planet and Uranus are so far way from the sun 10. spins differently from the other planets 12. is made of materials that are lighter than water 13. usually have less gravitiy 16. falling chunks of rock and metal 17. the layers of air around the Earth 19. does not make any light of its own 20. is an average start like the ones we see in the night sky 21. this planet is alot like our moon 23. it is the first of the outer planets and the largest planet in the solar system

Down 1. of the Earth makes night and day 2. are the four planets closest to the sun 3. when the Earth spins 4. when the heat is trapped by a planet's atmosphere, it is called 8. no longer named a planet 9. are huge explosions on the sun's surface 11. are areas that are cooler than the rest of the sun 12. the sun and all the bodies that orbit around it-the planets, their moons, the asteroids, comets, and other chunks of rock, ice and dust 14. no life has been foun on this planet 15. it never rains on this planet 16. at the center of the sun the temperature is about 15 ___ degrees Celsius 17. are chunks of rock and metal 18. our sun is more that a million kilometers across 22. the time is takes for a planet to go all around the sun