In what timeframe did Galileo begin his persistent observations that revealed the Moon's topographical features?

Answer

Late 1609 and continuing into 1610

Galileo initiated his systematic study and observation of the Moon shortly after gaining access to and improving the newly invented telescope, commencing these observations near the end of 1609 and proceeding into 1610.

In what timeframe did Galileo begin his persistent observations that revealed the Moon's topographical features?

#Videos

Galileo's Revolutionary Observation - YouTube

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