The one-page document known as the “Galileo manuscript” can’t be traced to any earlier than 1930 and was likely written by the notorious Italian forger Tobia Nicotra, it said in a statement.

Newly Discovered Letter Catches Galileo in a 400-Year-Old Lie Fearing repercussions of his groundbreaking scientific claims, which flew in the face of church doctrine, the famed astronomer fibbed.