Where does “urano-” come from?

urano- (Italian) comes from Ancient Greek οὐρανός, from Ancient Greek ϝορσανός.

Ancestry of “urano-”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	οὐρανός	the vaulted sky, on which the stars were attached...
2	Ancient Greek	ϝορσανός	—

urano- — Etymology, Origin & Word History | Etymology Explorer