DeepCurves in space

Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §12.4 Polar Coordinates and Planetary Motion, #32 · Multivariable Calculus · Curves in space

When will Halley's comet appear again

When will Halley's comet appear again? It disappeared in 1986 and its mean distance to the sun (average of $a + c$ and $a - c$ ) is $a = 1.6 \cdot 1 0^{9}$ kilometers.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §12.4 Polar Coordinates and Planetary Motion, #32

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