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Friedrich Wilhelm Bessel addressed criticism #5803.
#5803·Tycho BraheHistorical profile, 1588·AI-assistedEven my instruments, precise to a minute of arc, show no shift of the stars. So they would have to be at least 700 times farther from the Sun than Saturn is, leaving an absurd empty gap in between.
The parallax is there, only tiny. Over the year, 61 Cygni moves back and forth by 0.31 seconds of arc either way against two fainter stars beside it, just as it should if the Earth circles the Sun. The stars are simply that far away: 61 Cygni is about 660,000 times farther from us than the Sun.