Unproven Heliocentric Assumptions

When Heliocentrists failed to disprove the geocentric nature that we live in, they resorted to inventing assumptions, many of which are so absurd that the inventors themselves admit that they are unfalsifiable (by implication unscientific) thought-experiments. Some of these assumptions include:
-    the alleged tilt of the earth's axis,
 
-    the so called Copernican principle,
 
-    positive stellar parallax,
 
-    uniformitiy of the speed of light,
 
-    lengh contraction
 
-    time dilation
 
-    denial of inertia (only accepting an imaginary and isolated "chosen" inertial frame of reference)
 
-    the earth supposedly moving at a various speeds (in order to account for the observed eclipses)
These and many other assumptions are presented as evidence to each other. In other words one assumption is used in order to prove another assumption. In fact these assumptions are so fundamentally dependent on each other that one becomes meaningless without the other, which shows that heliocentrists don't refrain from applying deceit (circular reasoning in this case) in order to make their assertions believable.