The Earth's Orbit

The Earth's path around the Sun - spinning on its axis all along - defines much about our world's climate, and our daily lives.

Transcript

1. E A R T H ’ S O R B I T R O B E R T S I M P S O N
2. O N T H E M O V E • 100,000 kph (62,000 mph) • 365.24219 days • 940 million km (584 million miles)
4. T O P V I E W
5. T O P V I E W
6. N S S I D E V I E W
7. S S S S N N N N W I N T E R S U M M E R S P R I N G A U T U M N S E A S O N S
8. S S S S N N N N S O L S T I C E S O L S I T I C E E Q U I N O X E Q U I N O X
12. I M A G E : W I K I M E D I A C O M M O N S ( TA U ʻ O L U N G A )
14. I M A G E : W I K I M E D I A C O M M O N S ( TA U ʻ O L U N G A )
16. I M A G E : W I K I M E D I A C O M M O N S ( TA U ʻ O L U N G A )
18. I M A G E : W I K I M E D I A C O M M O N S ( YA N Z H A N G )
19. T H E E A R T H S P I N S R O L L I N G , R O L L I N G , R O L L I N G
20. T H E E A R T H S P I N S R O L L I N G , R O L L I N G , R O L L I N G
32. G O R E Y H A R B O U R , J E R S E Y; W I K I M E D I A C O M M O N S ( F O X Y O R A N G E )
48. C H E LYA B I N S K M E T E O R F E B R U A RY 2 0 1 3
55. M I L A N K O V I T C H C Y C L E S • Cycle in perihelion (precession of our orbit)
56. W I N T E R S U M M E R S P R I N G A U T U M N 2 3 , 0 0 0 Y E A R S
57. W I N T E R S U M M E R S P R I N G A U T U M N 2 3 , 0 0 0 Y E A R S
58. M I L A N K O V I T C H C Y C L E S • Cycle in perihelion (precession of our orbit) • Axial precession about our axis; like a wobbling spinning-top
59. 4 1 , 0 0 0 Y E A R S
60. 4 1 , 0 0 0 Y E A R S
61. 4 1 , 0 0 0 Y E A R S
62. M I L A N K O V I T C H C Y C L E S • Cycle in perihelion (precession of our orbit) • Axial precession about our axis; like a wobbling spinning-top • Shape of our orbit becomes more and less elliptical.
63. W I N T E R S U M M E R S P R I N G A U T U M N 1 0 0 , 0 0 0 Y E A R S
64. W I N T E R S U M M E R S P R I N G A U T U M N 1 0 0 , 0 0 0 Y E A R S
65. M I L A N K O V I T C H C Y C L E S • Cycle in perihelion (precession of our orbit) • Axial precession about our axis; like a wobbling spinning-top • Shape of our orbit becomes more and less elliptical. ! • We are half way through these cycles
67. S U M M A RY • Earth is tilted as it spins, this creates our seasons • The Earth’s spin creates huge speed differentials, and the Coriolis effect • The Earth’s spin, and the gravity of the Moon and Sun contribute to tides • Our orbit takes us into the path of other orbiting bodies • Periodic changes in our spin, tilt and orbit affect the global temperature