Page "Galilean moons" Paragraph 12
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On March 12, 1610, Galileo wrote his dedicatory letter to the Duke of Tuscany, and the next day sent a copy to the Grand Duke, hoping to obtain the Grand Duke ’ s support as quickly as possible.
On March 19, he sent the telescope he had used to first view Jupiter ’ s moons to the Grand Duke, along with an official copy of Sidereus Nuncius ( The Starry Messenger ) that, following the secretary's advice, named the four moons the Medician Stars.
In his dedicatory introduction, Galileo wrote:
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