Noun
A messenger.
The information communicated.
Source: Webster's dictionaryOn 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. Source: Internet
The discovery was announced in the Sidereus Nuncius ("Starry Messenger"), published in Venice in March 1610, less than two months after the first observations. Source: Internet
Dedication to the Medicis The Medician stars in the Sidereus Nuncius (the 'starry messenger'), 1610. Source: Internet