When were Galileo's initial telescopic findings about the Moon formally published?

Answer

In March 1610 in Sidereus Nuncius.

The formal dissemination of Galileo's revolutionary observations, which included the lunar findings, occurred the year after discovery in the publication titled Sidereus Nuncius.

When were Galileo's initial telescopic findings about the Moon formally published?
HistoryGalileoastronomytelescopeMoonobservations