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The Number 1609: Properties and Meanings1609 is a Prime Number.
The Year 1609 ADIn the year 1609 AD Johannes Kepler claimed in the journal Astronomia Nova that the orbit of Mars is an ellipse with the Sun at one focus, and sweeps out equal areas in equal time.
In the year 1609 AD Galileo made his first telescope.
In the year 1609 John Dee died.(Esoteric History)
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