If both clocks were correct, one would be redundant.

Topics in this episode include the Ballast Office, the timeball, stellar parallax, ships’ navigators and chronometers, the whereabouts of the timeball, the political controversy of Greenwich Mean Time, Dunsink time, Sir Robert Ball and The Story of the Heavens, what the heck parallax actually means, how James Joyce uses the term parallax in Ulysses, being your own solar eclipse, how to make friends and influence astronomers at the Dunsink Observatory, Robert Anton Wilson, Clyde Tombaugh, the epiphanies to be found in common street furniture, Bishop Berkeley’s thoughts on stereoscopic vision, Dedalus and Bloom as a binary star system, the hypostasis of urination, and crossing the streams.

Parallax

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