ALS, one page, 8.25 x 11, New Mexico State University Department of Astronomy letterhead, March 16, 1989. Letter to a planetarium store manager. In part: “Yes, my book ‘Out of the Darkness: The Planet Pluto’ went out of print…If you get a batch of these books, please correct the error on p. 72: The inclination of Encke’s comet should read ‘12:4’ not °24.” In fine condition, with intersecting folds. Accompanied by the original mailing envelope addressed in Tombaugh’s hand. RR Auction COA.
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