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Old February 22nd 16, 12:46 AM posted to sci.astro
Peter Riedt
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Posts: 83
Default 3rd Kepler law, twin stars, centres, and semi major axis

On Sunday, February 21, 2016 at 5:52:24 PM UTC+8, Poutnik wrote:
Dne 21/02/2016 v 09:52 Peter Riedt napsal(a):

Newton copied his law from Kepler, not the other way.

You got it wrong. In science, everything new
is built on the top of what was known before.
It is not like copying in art.

Yes.

Kepler laws are not laws, but empirical rules,
based on Tycho de Brahe data.

And Kepler's own observations.

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

Explicit yes, implicit no.

Newton law is low of gravitational interaction,
similarly as the Coulomb law for electrostatic interaction.

Mean what?

All Kepler laws(rules) are direct consequence of the Newton law,
that furthermore is not limited to ellipses.

Newton is a consequence of Kepler's laws. Yes Newton covers inertia.

--
Poutnik ( the Czech word for a wanderer )

Knowledge makes great men humble, but small men arrogant.