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Old February 22nd 16, 06:28 AM posted to sci.astro
Poutnik[_5_]
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Default 3rd Kepler law, twin stars, centres, and semi major axis

Dne 22/02/2016 v 00:46 Peter Riedt napsal(a):
On Sunday, February 21, 2016 at 5:52:24 PM UTC+8, Poutnik wrote:



They are rules of planetary kinematic,
they say nothing about gravitational interaction,
being proportional to masses
and reciprocal to squared distance.


Explicit yes, implicit no.


Because implicitly,
they hide the Newton law laying behind them,
that was waiting to be discovered.

Kepler laws are inaccurate, up to useless in 3 body cases,
like in case of an asteroid,
orbiting the Sun near the Jupiter orbit.

But Newton law describes its irregular orbit well,
in context of classical physics.


--
Poutnik ( the Czech word for a wanderer )

Knowledge makes great men humble, but small men arrogant.