[Tango-L] Tango Styles II

[Sergey Kazachenko]

( Sorry, this has nothing to do with tango. But I want to set the
record straight. )

> The difference here is that astronomy is a topic where there is a clear objective truth.

No, there is no such thing!

The choice of a central object around which other objects revolve is
simply the one of a convenience.
The Earth does not rotate around the Sun.
In Newton's mechanics, they both rotate against their combined center of masses.
Remember that the Sun rotates around the center of galaxy and our
galaxy rotates in the universe.

Ptolemy's model was well developed. By Copernicus' time, it contained
sets of 3-4 nested circles and could predict all planet movements with
high precision.
I read somewhere that adding a couple more sets of circles would make
it so precise you could send spaceships to the Moon and back using it!

When Copernicus introduced his views, his system wasn't developed enough.
He had nested circles as well, but a single man couldn't beat in
precision the system that was developed over the centuries.
As a result, initially Copernicus' system was worse for predicting
planet movements than Ptolemy's.
Only after Kepler replaced the circles with ellipses it started to
beat Ptolemy's in elegance and precision.

Now get back to tango,

Sergey