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1 2 3 4 9 5 6 7 10 12 8 11 13 14 15 18 19 20 21 22 24 28 25 29 26 16 17 23 27 30 31 32 33 34 35 36 37 38 42 39 43 40 41 44 45 47 48 51 46 49 50 52 53 54 57 58 55 56 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 82 78 83 87 89 84 79 81 85 86 88 90 91 92 94 93 95 96 97 99 100 105 80 101 106 102 107 110 111 98 103 108 112 116 117 104 109 113 118 119 114 115 120 121 122 123 124 125 126 127 128 132 133 129 134 130 131 135 136 137 138 139 140 141 142 143 144 145 147 146 148 149 150 151 152 153 154 ACROSS 2. C stands for ____ __ ____, in the formula e=mc2 5. the name of our galaxy 10. on the H-R diagram, the hotter the star the ____ it is 11. all the planets' orbits look very _____ 12. first day of spring and fall 15. of visible light, ___ ___ has the longest wavelength 18. greek word meaning- to wander, orbits the sun 20. may have eroded the Martian surface 22. cooler red stars can be more luminous than blue-white stars if they are ___ 28. ___ light has the shortest wavelength of visible light 29. order of the planets 31. earth-like 32. focal distance is the distance between an ellipse's ___ 33. the sun's most direct rays hit the Tropic of ___ on the first day of winter 34. 1:300 is an example of this type of scale 36. gamma rays have the ___ energy on the EMS 38. hazy cloud which surrounds the nucleus of a comet 40. uranus has a ___ of nearly 90°, may have been caused by miranda running into it 41. during the winter and spring the daylight hours ____ 42. fall begins in ___ 44. unlike the sun, most stars are parts of systems in which two or more stars ___ around each other 45. almost every object in space revolves ___ 47. Venus is the ____ brightest object in earth's sky 48. when contour lines form circles or ovals and have small lines jutting inward 50. a star's life begins in a cloud of gas and dust called a ____ 54. when contour lines are far ____ , the land is relatively flat 55. collected 20 years of data about planet movements 56. the portion of a spectroscope that makes the light refract 57. the earth's orbital speed is ___ as the earth gets further from the sun 60. the "red" planet 62. outer planet with a retrograde rotation, does not effect sunrise or sunset 64. this planet's year is the shortest , inner planet with the greatest temperature range 66. planet that would float on water 67. Neputne's most noted feature 73. continuous circulation of water through the hydrosphere 74. the earth is ____ to the sun on the first day of winter 75. blue stars are ___ than red stars 77. spin on its axis 82. red stars are ____ 83. non-Jovian outer planet 84. radio waves have ___ energy on the EMS 89. there are ___ center points on an ellipse 90. iron has ____ to create the red tint on the martian surfacer 92. radio waves have the longest ____ of the EMS 95. proportion that a map bears to the real thing 96. ___ days, the length of Mercury's day 97. the ___ is at one of the center points of earth's orbit 100. orbits a planet 101. jupiter's moon with active volcanoes 103. when contour lines cross a stream they form a "V" pointing ___ 104. "dirty snowballs" 105. 90% of the universe that we can see, a nebula is primarily 107. what the sun will become 110. the shape of every orbit 116. explained the forces involved with an orbiting object 117. path of a revolving object, Pluto's _____ is the most elliptical and is tilted compared to the rest 120. most of Venus' atmosphere 122. the inner planets have ___ moons 123. rocks, mountains, beaches, and all the physical features on earth 124. the lower the magnitude the ___ the star is 128. when contour lines form circles or ovals, it indicates _____ 129. stars or constellations that can only be seen during parts of the year 130. most commonly believed theory for the start of the universe 132. phenomenon which makes sounds that are approaching have a higher pitch than if they are going away 135. venus is the ____ planet 137. number of objects the greeks considered planets 138. the inner planets are ___ compared to the outer planets 139. 0° longitude 147. longer wavelengths are refracted ___ than shorter wavelengths 148. every ____ has its own unique spectral signature 149. hydrogen plus hydrogen yeilds ____ and a small amount of stuff 150. largest planet 151. winter is the ___ season 152. summer is the ___ season 153. huge amounts of ____ are created during fusion 154. there are ___ hours of daylight at the south pole on the first day of winter DOWN 1. the first letters of visible light 2. when the contour lines are close together the land is ____ 3. saturn is less ___ than water, meaning it would float on water 4. atmospheric pressure on venus is ___ times that of earth 6. one of earth's revolution takes a _____ 7. diagram that plots magnitude of stars against their surface temperatures 8. mercury is heavily ___, making look like our moon 9. astronomer's tool, prism on the end of a telescope 13. other than our sun, the next closest star is approximately 4.3 ___ away at the speed of light 14. have the shortest wavelengths on the EMS 16. a measure of how uncirclular an ellipse is 17. there are ___ hours of daylight everywhere on earth on the equinox 19. the average distance from earth to the sun 21. travel around another object 23. shaking of the earth's crust caused by a release of energy 24. venus has a ___ rotation, meaning that it goes in a clockwise direction 25. force that burns up meteoroids 26. when light is bent it is ____ 27. shared his idea of a heliocentric model on his death bed 30. the two farthest stars in the big dipper's handle 35. nuclear reaction that takes place in a star 37. pluto's orbit is the most ____ orbit 39. number of inner planets 43. have the longest wavelengths on the EMS 45. difference in elevation between 2 consecutive contour lines 46. lines that run east and west and measure distances north and south of the equator 49. the light you see from a star is from the ____ 51. Jovian planets have a surface made of 52. jupiter's moon that may have an ocean under an ice surfacet 53. meteoroids that reach the earth's atmosphere 55. has a gravitational force so strong that light can not escape 58. saturn has over 1,000 ___ 59. the inner planets are composed of ___ 61. located between mars and jupiter 63. the sun is a ____, a ___ forms when fusion starts in a nebula 65. the sun's color is ____ 66. steepness of the landscape 68. movement that is actually occuring 69. gases that surround the earth, reason that the Earth has relatively few impact craters, Mercury has a trace one 70. one of earth's rotation creates a ____ 71. ___ light has the longest wavelength of visible light, the coolest stars 72. caused when earth crosses a comets path 73. 270° 76. an ellipse with an eccentricity approaching ___ has a very flat shape 78. hottest stars 79. a representation of an object, process, or a phenomenon 80. the ___ an object, the greater its apparent motion can be 81. living things on earth 85. in the 1930's edwin hubble observed that ___ the galaxies were red shifted 86. contains all the water on earth 87. a star's ___ is based on its surface temperature 88. number of outer planets, the sun is thought to be ___ billion years old 91. number of hours of sun the north pole gets on the winter solstice 93. planet closest to earth 94. the sun is at the ____ of its life cycle 98. force needed to orbit, distance and mass are the 2 variables that effect it 99. pluto's "moon" 102. spring begins in ___ 106. a group of stars that may orbit a black hole, billions of stars orbiting a center point 108. may account for 90% of the universe's mass 109. the earth is ____ from the sun on the first day of summer 110. the white dwarf stage is at the ___ of a stars life cycle 111. shows a large amount of detail 112. the first day of summer and winter 113. number of moons mercury has 114. speed of light, 186,000 ____ per second 115. is created when a star is moving away from earth 118. a super giant star in orion 119. part of a comet that can be 100,000,000 miles long 121. number of planets in our solar system 125. directly overhead 126. unlike sound waves, electromagnetic waves can travel through empty ___ 127. the second full moon in one month 131. noticed 7 objects moving differently than the rest of the stars, originated geocentic model, greek who is attributed with the earth centered universe 132. winter begins in ___ 133. difference in elevation from the lowest to highest points 134. the orbital speed is ___ as the earth nears the sun, the stars on the outside edge of a galaxy travel ___ than the stars closer to the center of the galaxy 136. the number of stars in a galaxy 139. the north star 140. Mars' ___ may be made of carbon dioxide and water 141. constellations are groups of stars that form a pattern as viewed from ____ 142. the sun's most direct rays hit the ___ on the equinox 143. rocky crusted planets, the first 4 planets 144. earth's orbital speed ___ constant 145. planet that has the great dark spot 146. during the summer and fall the daylight hours ___ 147. an earth day is ____ than an earth's rotation