The Hipparcos satellite (used to position stars) is so precise that if placed at the top of the Eiffel Tower, it would be able to distinguish between two sides of a coin standing on the edge of the Empire State Building in New York.
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The Hipparcos satellite (used to position stars) is so precise that if placed at the top of the Eiffel Tower, it would be able to distinguish between two sides of a coin standing on the edge of the Empire State Building in New York.
