This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Houghton IC.G.s Sidereus nuncius. en Title page of Sidereus nuncius by Galileo Galilei lib harvard edu IC Houghton Library Harvard University lib harvard edu IC Houghton Library Harvard Universitybr institution Houghton Library Galileo Galilei This is media file that Houghton Library believes to be in the public domain of