3. Did You Know…

4. …That the Earth wobbles on its axis…?

5. It’s called…

6. Precession

7. It’s called… Precession (Both Weebles and the Earth wobble, but neither falls down…)

8. Earth completes 1 full cycle of wobble every 26,000 years.

9. Like This….

11. Notice that the direction the North Pole points is changing.

13. Precession- The wobbling motion of the Earth on its axis.

14. 1 wobble takes 26,000 years

15. Question

16. Which star will be the North Star in the year 14,000 AD? Question

17. Answer

18. Answer Vega !

19. Look Again

21. Vega – the polar star in 14,000 AD

22. Look Again

24. The Zodiac

26. WestEast

27. Planet Moon WestEast

28. Planet Moon WestEast

29. Planet Moon The Zodiac- The narrow belt, 18 o wide, which includes the paths of the planets and the Moon. WestEast

30. Planet Moon The Zodiac- The narrow belt, 18 o wide, which includes the paths of the planets and the Moon. The Ecliptic lies at the center of the Zodiac WestEast

31. Planet Moon The Zodiac- The narrow belt, 18 o wide, which includes the paths of the planets and the Moon. The Ecliptic lies at the center of the Zodiac WestEast

32. Planet Moon The Zodiac- The narrow belt, 18 o wide, which includes the paths of the planets and the Moon. The Ecliptic lies at the center of the Zodiac WestEast

33. Planet Moon WestEast

34. Planet Moon This is what we see when viewing the Zodiac from Earth. WestEast

35. Planet Moon WestEast

36. Planet Moon WestEast But when viewing from space,

38. But when viewing from space, then the Zodiac looks like this:

41. The Zodiac

46. The Ecliptic

50. The Zodiac represents the middle belt of the Celestial Sphere.

52. The belt is divided into 12 equal segments,

56. The belt is divided into 12 equal segments, each called a “sign” of the Zodiac.

58. A “Sign of the Zodiac” is only an area of space in the sky.

60. Don’t confuse the “Signs of the Zodiac” with the Constellations of the Zodiac.

62. Since the entire circle has 360 o, then

63. Since the entire circle has 360 o, then each sign of the Zodiac is 30 o wide.

64. 30 o wide

65. Since the entire circle has 360 o, then each sign of the Zodiac is 30 o wide.

68. The Zodiac has its beginning with the Sign of Aries.

70. The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

72. Vernal Equinox The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

73. Vernal Equinox The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

74. Vernal Equinox

75. The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring. Vernal Equinox

76. The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

77. Vernal Equinox

78. The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

79. Vernal Equinox

80. The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

81. Vernal Equinox

82. Of course, each Sign of the Zodiac will contain stars.

83. Taurus AriesPisces Aquarius Vernal Equinox Of course, each Sign of the Zodiac will contain stars.

84. Taurus AriesPisces Aquarius Vernal Equinox

85. Taurus AriesPisces Aquarius Vernal Equinox Shown are four Constellations of the Zodiac, located in four “Signs of the Zodiac”.

86. Taurus AriesPisces Aquarius Vernal Equinox

87. Taurus AriesPisces Aquarius Vernal Equinox Due to precession of the Earth on its axis, the Constellations no longer match the Signs of the Zodiac.

88. For Example…

90. The Sign of Aries now contains the Constellation of Pisces

98. Here’s why…

99. Vernal Equinox

100. Taurus AriesPisces Aquarius Vernal Equinox

101. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries

102. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C.

103. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

104. Taurus Aries Pisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

105. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

106. Taurus Aries Pisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

107. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

108. Taurus Aries Pisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

109. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

110. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C.

111. Taurus AriesPisces Aquarius

112. Taurus AriesPisces Aquarius

113. Taurus AriesPisces Aquarius

114. Taurus AriesPisces Aquarius Vernal Equinox

115. Taurus AriesPisces Aquarius Vernal Equinox

116. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries

117. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries Today

118. Taurus AriesPisces Aquarius …But due to precession, today the Vernal Equinox occurs a month earlier. Vernal Equinox Sign of Aries Today

119. Taurus AriesPisces Aquarius Vernal Equinox Today Sign of Aries

120. Taurus AriesPisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Sign of Aries Today

121. Taurus Aries Pisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

122. Taurus AriesPisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

123. Taurus Aries Pisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

124. Taurus AriesPisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

125. Taurus Aries Pisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

126. Taurus AriesPisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

127. Taurus AriesPisces Aquarius Vernal Equinox Today

128. Taurus AriesPisces Aquarius

129. Taurus AriesPisces Aquarius

130. Taurus AriesPisces Aquarius

131. Taurus AriesPisces Aquarius Vernal Equinox

132. Taurus AriesPisces Aquarius Vernal Equinox

133. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries

134. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D.

135. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. As the Earth continues to precess on its axis,

136. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. As the Earth continues to precess on its axis, the Vernal Equinox will continue to shift.

137. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D.

138. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. This will also cause the Sign of Aries to shift.

139. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D.

140. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

141. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

142. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

143. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

144. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

145. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

146. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

147. Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D.

148. Taurus AriesPisces Aquarius

149. Taurus AriesPisces Aquarius So when will the Sign of Aries again contain the Constellation of Aries?

150. Taurus AriesPisces Aquarius

151. Taurus AriesPisces Aquarius Answer: in 24,000 more years.

152. Taurus AriesPisces Aquarius

156. Constellations of the Zodiac

157. Which constellation is in the daytime sky in May?

158. Constellations of the Zodiac Which constellation is in the daytime sky in May?

159. Constellations of the Zodiac Which constellation is in the daytime sky in May?

160. Constellations of the Zodiac Which constellation is in the daytime sky in May?

161. Constellations of the Zodiac Which constellation is in the daytime sky in May?

162. Constellations of the Zodiac Which constellation is in the daytime sky in May? Answer: Aries