The Terrestrial Planets, Part II The Earth. EARTH.
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Transcript of The Terrestrial Planets, Part II The Earth. EARTH.
![Page 1: The Terrestrial Planets, Part II The Earth. EARTH.](https://reader033.fdocuments.net/reader033/viewer/2022052414/56649c6d5503460f9491f070/html5/thumbnails/1.jpg)
The Terrestrial Planets,Part II
The Earth
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EARTH
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Physical Data
Diameter: 12,756.3 km Mass: 5.976x1027 g Density: 5.518 g/cm3
Rotation Period: 23.9 hours Tilt of Axis: 23.5o
Surface Temperature: 200-300 K
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Physical Data
Orbital Semi-Major Axis: 1.49x1011 m (1 AU)
Orbital Period: 365.26 days Orbital Inclination: 0o
Orbital Eccentricity: 0.017 Satellites: 1 Magnetic Field: yes
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Earth’s Interior
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Earth’s Interior
MANT L E CURR ENT S
OCEAN F L OOR
MOUNTAIN RANGE
CONT I NE NTR I F F S
T R ENCH
Currents in the Mantle Cause Plate Tectonics
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Earth’s Surface
Continental Drift
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Earth’s Surface
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Earth’s Atmosphere
75.5% Nitrogen 23.1% Oxygen 1.29% Argon 1.7-0.06% Water Vapor 0.05% Carbon Dioxide 0.0013% Neon 0.00007% Helium
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Earth’s Atmosphere
( I on os phere )
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The Ionosphere
F2
F1
E
D
F layerscombineat night
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The Ionosphere
Altitudes of the Ionospheric Layers
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The Ionosphere Reflection of Radio Waves
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The Ionosphere
Creation of Ions
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Earth’s Magnetic Field
S
N
S
N
Dipolar Field
Magnetic South Pole is Located in the Geographic North Pole!
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Earth’s Magnetic Field
Van Allen Belts Inner Belt - Positive
Protons Outer Belt - Negative
Electronse
_ p+
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Aurorae
From the ground
m
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Aurorae
The Auroral Oval
From Space
From the Space Shuttle
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Magnetosphere
gjjikui
Van Allen Belts
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The Moon
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Earth’s Moon Average Distance to Earth: 384,400km (238,855
miles) Orbital inclination: 5.1o
Diameter: 3476 km (0.273 DEarth)
Mass: 7.35x1025 g (0.0123 MEarth)
Surface Temperature: -274o F (night)
266o F (day) Surface Gravity: 0.167 Earth’s
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The Moon’s Interior
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The Moon’s SurfaceCraters: Maria:
Older Terrain Younger Terrain
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The Moon’s Surface
Mare Orientale Largest impact
crater on the Moon Has three
concentric circular mountain ranges created by the impact