Answer :
The discoveries in the astronomy prompt a change in Catholic church by Pope Gregory XIII to adopt a revised calendar.
Who was Pope Gregory XIII ?
Pope Gregory XIII was the ruler of papal states Rome and was the leader of Catholic church in 1572. He propounded the Gregorian calendar.
He prompted the change in the manner that he introduced the reformation of the calendar to correct the issue. He also revised the method of calculating the leap years.
Thus the first statement is correct, he adopted a revised calendar.
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