Ejnar Hertzsprung’s letter to The
Observatory
Ejnar Hertzsprung’s letter in the
1923 February issue of The
Observatory in which he disowned any
credit for the three-letter abbreviations of the constellations
adopted by the IAU. Hertzsprung’s own two-letter list was
published in Annalen van de Sterrewacht te
Leiden. In line 2 of the letter below, the reference to p. 12
should read p. 22.
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