Global Time and Different Time Scales
Global Time There’s an old Canadian joke that goes, “Repent! The world will end at midnight!—or, 12:30 a.m. in Newfoundland.” […]
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The Geographic Grid of Earth System
The Geographic Grid It is impossible to lay a flat sheet of paper over a sphere without creasing, folding, or
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Shape of the Earth & Its Rotation
The Shape of the Earth As we all learn early in school, the Earth’s shape is very close to a
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