I Measured the Skies is episode 3 of the TV series Biography about Johann Kepler, for which Delia created the atmospheric piece Music of Spheres.
It was produced by Mark Shivas or John Glenister, written by James Brabazon, adapted from Arthur Koestler's The Sleepwalkers and first broadcast on 4 November 1970.
It is also listed in Briscoe's document Radiophonic Workshop Television and Radio Commitments for 1970.
The title of the episode is taken from Kepler's epitaph:
I measured the skies, now the shadows I measure,
Sky-bound was the mind, earth-bound the body rests.