Motion and Medieval Cosmology Flashcards
-Medieval Cosmology -The Copernican Revolution -Calculate d,v,t
1
Q
Galileo’s observations
A
- He saw the moons of Jupiter
- universe is not geocentric
- more heavenly bodies - He saw the phases of Venus
- heliocentric - He saw sunspots
- heavenly bodies are changing - He saw the moon’s mountains and craters
- imperfect
2
Q
retrograde motion
A
when a planet appears to reverse its course
3
Q
epicycle
A
circular path around a center point in which the center point travels on a circular path around the Earth
4
Q
The Ptolemaic Model
A
- seven heavenly bodies
- all heavenly bodies are perfectly spherical
- all heavenly bodies move in circular orbits called spheres
- all of the spheres are centered on Earth
- corruption and change only exist on Earth. All other heavenly bodies in the universe are perfect and unchanging
- all of the spheres containing the heavenly bodies and all the stars rotate completely around the Earth every 24 hours
- Epicycles are used to explain retrograde motion
- nine spheres and region beyond the spheres
5
Q
sphere 1
A
moon
6
Q
sphere 2
A
mercury
7
Q
sphere 3
A
venus
8
Q
sphere 4
A
sun
9
Q
sphere 5
A
mars
10
Q
sphere 6
A
jupiter
11
Q
sphere 7
A
saturn
12
Q
sphere 8
A
the firmament
13
Q
sphere 9
A
Primum Mobile
14
Q
Empyrean Region
A
the abode of God
15
Q
The Copernican Model
A
- sun centered
- Earth spins on its axis around the sun
- Earth and the other planets move in circular orbits
- claimed his model was more elegant than Ptolemy’s because the math was much simpler
- only circulated findings among friends
