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On Tue, 15 Mar 2011 09:53:41 +0100, Szczepan Bialek rearranged some
electrons to say:


It is interesting that Roemer has measured 220 000 km/s. S*

Why is that interesting? He was wrong.

From the same data Newton calculated 310 000 km/s. But it was for the Earth
the Sun (the hottest region).
Roemer's method measures speeds of light in different regions of the Solar
System.

Cecil wrote: "Are we sure that the velocity of light is a ".

"c" is the *universal* constant in EM (calculating factors between different
units).

"velocity of light" is the medium and temperature dependent.
S*