Exam 1 part 2

Question 1

Epicycles

Answer 1

Giant orbit around which planets can move; can vary in size & planets can vary in speed

Question 2

Equant Point

Answer 2

Point where planet moves in uniform motion relative to it/relative to that point.

• Mathematically calculated
• Without this point, it doesn’t respect the Uniform Motion “FACT” of previous AWV

Question 3

Eccentric

Answer 3

An epicycle/orbit off-center from Earth

Question 4

Deferent

Answer 4

An epicycle/orbit that is center of Earth

Question 5

Perfect Circle Fact

Answer 5

Planets need to move in perfect circle, orbit in perfect circle

• planets are also perfect circle shape
• perfect circle is close to godliness
• was a philosophical/conceptual fact about AWV

Question 6

Uniform Motion Fact

Answer 6

Planets need to move in uniform motion around their orbit

• at uniform speed, trajectory
• was a philosophical/conceptual fact about AWV