Martin Horky

Martin Horky was a mathemetician from Bohemia. In 1610, after Galileo Galilei had published the Sidereus Nuncius, Horky had roundly dismissed Galilei's observations regarding the surface of the Moon and the moons of Jupiter as either flaws in Galileo's spyglass, or a cynical attempt on Galileo's part to earn money. Every ally Horky had quickly dismissed him after this attack on Galileo.

Martin Horky in "But It Does Move"
Years later, Galileo Galilei was still bitter about Martin Horky's denounciations. Cardinal Sigismondo Gioioso suggested that Galileo had published the Dialogue Concerning the Two Chief World Systems as a response to Horky and likeminded critics, an idea which Galileo fully accepted.