what we call the "ptolemaic" system of astronomy is making what basic...

[Hadra M]

...assumptionabout the univers? what term do we use to describe this kind of universe?

[Michael Steen]

Ah, it's homework time. I don't suppose you considered going to Wikipedia for some answers rather than taking the time to find this forum, register, and post a question.
If someone here GIVES you the answers, that's all you'll have. You'll have no understanding nor any breadth of knowledge. If you look them up, you'll not only get what you need, but you'll learn a great deal about Ptolemy and when he lived and why he believed as he did and how his beliefs influenced later astronomers and who finally began to dispute his theory and what the empirical observations were that led to that disputation and why the Church was firmly in Ptolemy's camp and what put the final nail in the coffin of that system.
OK?