A Watermark, and 'Spidey Sense,' Unmask a Forged Galileo Treasure

One of the University of Michigan Library's most prized possessions, which appeared to be a Galileo manuscript, is now thought to be the work of a 20th-century forger. From a report: Galileo Galilei was peering through a new telescope in 1610 when he noticed something strange: several bright objects flickering around the planet Jupiter that seemed to change positions nightly. His discovery, of moons orbiting Jupiter, was a major crack in the notion, widely held since antiquity, that everything in the universe revolved around the Earth. The finding, which was condemned by the Catholic Church, helped prove the theory of a sun-centered solar system. For decades the University of Michigan Library has prized a manuscript related to the discovery, describing it as "one of the great treasures" in its collection. At the top is the draft of a letter signed by Galileo describing the new telescope, and on the bottom are sketches plotting the positions of the moons around Jupiter -- "the first observational data that showed objects orbiting a body other than the earth," the library described it. At least it would be if it were authentic. After Nick Wilding, a historian at Georgia State University, uncovered evidence suggesting the manuscript was a fake, the library investigated and determined that he was right: The university said Wednesday it had concluded that its treasured manuscript "is in fact a 20th-century forgery." "It was pretty gut-wrenching when we first learned our Galileo was not actually a Galileo," Donna L. Hayward, the interim dean of the university's libraries, said in an interview. But since the purpose of any library is to expand knowledge, she said, the university had decided to be forthright about its findings and publicly announce the forgery. "To sweep it under the rug is counter to what we stand for."

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