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gps3

The Schwarzschild Metric: Part 3, A Newtonian Comparison

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A Short Proof of Birkoff's Theorem derived the Schwarzschild…
gps2

The Schwarzschild Metric: Part 2, The Photon Sphere

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  A Short Proof of Birkoff's Theorem derived the Schwarzschild…
gps1

The Schwarzschild Metric: Part 1, GPS Satellites

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  A Global Positioning System (GPS) device gives your…