Earth’s orbit around the Sun is not circular, but an ellipse. The perimeter of Earth’s orbit is roughly 584 million miles (940 million km).

WILL one of your mathematical readers kindly state whether the following empirical formula gives a nearer approximation to the perimeter of an ellipse than that usually given in pocket-books of ...

Don’t fence in the Ellipse — and reopen E Street August 26, 2011 The White House is basically a fortress, one strengthened internally in the 1950s with 660 tons of steel-reinforced concrete.

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