Answer:
Because unlike other scientists at his time, he believed the Earth was the center of the universe. The opposite of the geocentric model is the heliocentric, where the Sun is the center of the universe (correct model).
Cause he has no friends :(
1 inch top to bottom 1.25 on the sides
D- the informal language in oh that combing and set my teeth
C.The protagonist struggles with a decision to share a secret
hope this helps