Final answer:
The group of words is a clause, which is a group of words that contains a subject and a verb and can express a complete thought. The phrase within the clause is a participial phrase that functions as an adjective.
Step-by-step explanation:
The group of words "Using telescopes that he created, Galileo Galilei, a famous Italian astronomer during the sixteenth and seventeenth centuries, discovered Jupiter's four largest moons" is a clause.
A clause is a group of words that contains a subject and a verb and can express a complete thought. In this case, the clause includes the subject "Galileo Galilei" and the verb "discovered."
The phrase "Using telescopes that he created" is a participial phrase. A participial phrase is a group of words that begins with a participle (in this case, "Using") and functions as an adjective. It provides additional information about the subject of the clause.
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