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Across 1. This planet is called Earth's twin because of its size 3. This is the only "rocky" outer planet 8. The amount of time it takes for the Earth to spin once 10. This planet has the "Great Dark Spot" on its surface 12. The seventh planet from the Sun 15. This planet is the only with living things and liquid water on its surface 16. This planet is called the Red Planet 18. The first planet from the Sun 21. The fourth planet from the Sun 23. First artificial satellite in space 26. A relatively small body made of rock, carbon or metal which is orbiting the Sun 27. This planet has the Great Red Spot on its surface (which is a moving storm) 31. This planet has similar features as our Moon 32. A word to describe spinning 33. This type of telescope uses lenses 34. This is what the first 4 planets are called 38. First American in space 41. This type of telescope uses mirrors 42. The reusable spacecraft 43. First woman in space 46. The four larger outer planets are made up mainly of this 47. Mainly the last planet from sun, but sometimes the 8th 49. Pilot that flew Armstrong and Aldrin to the Moon 51. The fifth planet from the Sun 53. The sixth planet from the Sun 54. This word describes the left part of the Moon shining 55. A circular path around an object 56. This type of eclipse is when the Moon is in between the Sun and Earth

Down 1. The second planet from the Sun 2. This is a relatively small object made of dirt and ice that has a tail that appears as it gets closer to the Sun 4. This is a meteoroid that burns in the Earth's atmosphere 5. This planet is the hottest because of the greenhouse effect trapping heat 6. The amount of time it takes for the Moon to go through all of its phases which is the amount of time it takes for one rotation and one revolution 7. This planet has such a low density that it would be able to float in water 9. The amount of time it takes for the Earth to orbit the Sun once 11. The lighter region of a shadow of an eclipse 13. This word describes the right part of the Moon shining 14. Second Human to step on the Moon 17. Something that orbits another object 19. This word describes a small part of the Moon shining 20. A meteoroid that survives Earth's atmosphere and hits the Earth 22. Mainly the 8th planet from sun, but sometimes the last 24. A small particle from an asteroid or comet that orbits the Sun 25. Our sun is one of these 27. This is the largest planet in our solar system 28. The third planet from the Sun 29. This word describes a large part of the Moon shining 30. First Human in space (Russian) 35. First Human to step on the Moon 36. This is what causes the seasons 37. This is what the last 5 planets are called 39. A word to describe an orbit 40. First Human to orbit the Earth 44. This country was the USA's main competitor in early space travel 45. A space instrument that we don't get back that goes into dangerous places 48. This planet spins on its side 50. This type of eclipse is when the Earth is in between the Sun and Moon 52. The darker region of a shadow of an eclipse