The heliocentric model of the universe developed by copernicus and galileo was considered heresy during their lives because it?
3.challenged the secular power of absolute monarchs.
The reason that the heliocentric model of the universe that are developed by both Galileo and Copernicus has been considered to be a heresy during their lives was because that there has been a conflict in regards with the official doctrine of the Roman Catholic Church. The correct answer is letter d.