A second large order of equivocating appearances will arise,--not as to
magnitude, but as to motion. If it could be a safe assumption, that the
system to which our planet is attached were absolutely fixed and
motionless, except as regards its own _internal_ relations of
movement, then every change outside of us, every motion that the
registers of astronomy had established, would be objective and not
subjective. It would be safe to pronounce at once that it was a motion
in the object contemplated, _not_ in the subject contemplating.
Or, reversely, if it were safe to assume as a universal law, that no
motion was possible in the starry heavens, then every change of
relations in space, between ourselves and them, would indicate and
would measure a progress, or regress, on the part of our solar system,
in certain known directions. But now, because it is not safe to rest in
either assumption, the range of possibilities for which science has to
provide, is enlarged; the immediate difficulties are multiplied; but
with the result (as in the former case) of reversionally expanding the
powers, and consequently the facilities, lodged both in the science and
in the arts ministerial to the science. Thus, in the constellation
_Cygnus_, there is a star gradually changing its relation to our
system, whose distance from ourselves (as Dr.
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