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sisted on in respect of Copernicus’s revival
of the idea of the earth’s orbital motion.
Still, the desire to measure this paral-
lax was only intensified by the practical cer-
tainty of its existence, and by repeated fail-
ures. The attempts of Bradley failed. The
attempts of Piazzi and Brinkley,[1] early in
the nineteenth century, also failed. The
first successes, afterwards confirmed, were
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