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Across 6. the Danish astronomer that made observations to show that planets don't orbit in complete circles 9. the process that transfers energy in the middle layer of the sun 10. He said the orbits of planets were ellipses 12. reddish loops of gas on the sun 13. this astronomer finally had enough evidence to prove that heliocentricism was correct 14. patterns of stars named by the Greeks 16. Venus has ___ similar to our moon 20. many of these melted trying to explore Venus 21. the photosphere give off this 22. 95% of Mars's atmopshere is this gas 23. there is a concentration of these structures between Mars and Jupiter 26. a moon of Mars 27. this process creates the energy of the sun 29. the color Mars is known for 32. sun centered solar system 33. region of asteroids found beyond Neptune's orbit 35. planet with no moons, no seasons, and is Earth's twin 36. areas of cooler gas on the sun's surface 37. only has an atmosphere when closest to the sun 38. number of parts of the sun's atmosphere 39. Earth is at the center of the SS 44. largest volcano in the SS 46. weather system on Neptune 47. the corona of the sun gradually thins into streams of electrically charged particles called this 48. they contain ice, liquid water, dust, and rock 50. these animals can survive under high pressure 51. this layer of the atmosphere is blocked during a solar eclipse 54. the name of the space probes that have tested soil on Mars 56. the moon of Saturn that has ice geysers 57. when our atmosphere is charged by the electric current from the solar winds 58. evidence of stream beds has been found on which planet 59. since the sunspots don't move across the surface of the sun, that indicates the sun ____

Down 1. a moon of Mars 2. it can take this many years for the energy to move through the radiation zone 3. the poles of Mars have these landforms 4. planet that orbits on its side 5. largest feature on Mercury 7. outermost layer of the sun 8. storm on Jupiter 11. Polish astronomer that determined the arrangement of the planets 15. formed when prominences connect and release magnetic energy 17. the core of the sun reaches ___ million degrees Celsius 18. USA spacecraft made a flyby of Venus in 1998 19. largest of Jupiter's moons, contains active volcanoes 24. moon of Pluto 25. deepest, longest valley in the SS 28. Greek that developed heliocentricism 30. this moon may have liquid water under its icy crust 31. largest moon in the SS 34. Greek who believed in geocentricism and ideas lasted for 1500 years 40. middle layer of the sun's atmosphere 41. the ____ condition states the favorable conditions of life 42. rocks found in ____ may have come from Mars 43. because Mars has tilted axis it has these 45. the discoverer of Uranus 48. outer layer of the sun's atmosphere 49. gas that makes some planets appear blue 52. Galileo discovered this aspect of Saturn 53. all living things are made of one or more of these 55. fuzzy cloud around the nucleus of a comet