Early Theory and Attempts
Stellar parallax is so small (as to be unobservable until the 19th century) that it was used as a scientific argument against heliocentrism during the early modern age. It is clear from Euclid's geometry that the effect would be undetectable if the stars were far enough away, but for various reasons such gigantic distances involved seemed entirely implausible: it was one of Tycho Brahe's principal objections to Copernican heliocentrism that in order for it to be compatible with the lack of observable stellar parallax, there would have to be an enormous and unlikely void between the orbit of Saturn and the eighth sphere (the fixed stars).
James Bradley first tried to measure stellar parallaxes in 1729. The stellar movement proved too insignificant for his telescope, but he instead discovered the aberration of light, the nutation of the Earth’s axis, and did a cataloging of 3222 stars.
Read more about this topic: Stellar Parallax
Famous quotes containing the words early, theory and/or attempts:
“... goodness is of a modest nature, easily discouraged, and when much elbowed in early life by unabashed vices, is apt to retire into extreme privacy, so that it is more easily believed in by those who construct a selfish old gentleman theoretically, than by those who form the narrower judgments based on his personal acquaintance.”
—George Eliot [Mary Ann (or Marian)
“... the first reason for psychology’s failure to understand what people are and how they act, is that clinicians and psychiatrists, who are generally the theoreticians on these matters, have essentially made up myths without any evidence to support them; the second reason for psychology’s failure is that personality theory has looked for inner traits when it should have been looking for social context.”
—Naomi Weisstein (b. 1939)
“Bankruptcy is a sacred state, a condition beyond conditions, as theologians might say, and attempts to investigate it are necessarily obscene, like spiritualism. One knows only that he has passed into it and lives beyond us, in a condition not ours.”
—John Updike (b. 1932)