Discoverers of Comet Shoemaker–Levy 9, a comet that broke apart and collided with Jupiter in July 1994. Ink signatures of Gene and Carolyn Shoemaker and David Levy on an off-white 5 x 3 card; a commemorative cover with a cachet honoring Surveyor 6, signed in blue ballpoint by Eugene Shoemaker; and an FDC with a cachet honoring the completion of the Palomar Observatory, signed in blue and black ballpoint by Gene and Carolyn Shoemaker and David Levy. In fine condition, with pencil address to FDC. Pre-certified Steve Zarelli and RR Auction COA.
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