In 1610 he returned to Florence, where he obtained a better economic situation enabling him to dedicate more time to research ​ — but at the expense of the freedom he had enjoyed in the territory of the Venetian Republic.
Aastal 1610 pöördus Galilei tagasi Firenzesse, kus ta majanduslik olukord paranes, nõnda et ta sai pühendada rohkem aega uurimistööle. Paraku pidi ta tooma ohvriks vabaduse, mida ta oli saanud nautida Veneetsia Vabariigi territooriumil elades.