Answer:
He helped created modern astronomy.
Explanation:
In early 1610, he made the first in a remarkable series of discoveries. While the scientific doctrine of the day held that space was perfect, unchanging environments created by God, Galileo's telescope helped change that view. He used the telescope to revolutionise astronomy which had relied for millennia on observations and measurements made with the naked eye.
Sahel-the ecoclimatic and biogeographic realms transition in Africa between Sahara to the north’s s the Sudanian savanna to the south.
I’m sure it’s Sahel
Promulgated in 1582 by Pope Gregory XIII.
