2 Matching Annotations
- Apr 2021
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phys.libretexts.org phys.libretexts.org
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solving P2=4π2GMr3P2=4π2GMr3\mathrm{P^2=\frac{4π^2GM}{r^3}} for the ratio r3P2
Should this be, "... for M" rather than "r^3/p^2"?
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P2=4π2a3GM
This derivation is only valid for circular orbits as mentioned above just under "Derivation of Kepler's Third Law". Although Kepler's third applies to elliptical orbits, I don't think you can replace radius with semi-major axis (5.6.22 -> 5.6.23). Maybe "a" in 5.6.23 is a typo?
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