Since no one liked my last question.... heres a more difficult 2 part question... by the way there wont be any multiple choices!! Bwahahaha... thats what you get for not liking my science questions.

Part A) What was the name of the model Aristotle created to justify his belief that the Earth was the center of the Universe

Part B) Maria Celeste was the daughter of a great astronomer that was born on February 15, 1564, what is the name of this astronomer?