Daily rise

1
Daily rise set of sun, moon, stars
2
Daily motion of stars

• Deductions
• Earth spins
• Spherical shape
• Moon reflects
• Suns light
• A coordinate
• system for the sky

3
Seasons
4
Planets
Constellations wanders
Ptolomes geocentric model
5
Copernicus revolution
Planets retrograde motion
Heliocentric model
6
Keplers 3 laws
Brahes observations

• planets orbit are eccentric
• A planet sweeps out an equal
• area per equal time interval
• 3) Period square is proportional
• to the semi major axis cube

7
Keplers 3 laws
Shape of orbit
Comparison of orbits P2 Ka3
Rate of change
8
Galileos proof of heliocentric model
Phases of venus
9
Galileos other contributions
Lunar craters, moons of Jupiter, sunspots
Inertia Acceleration rate of change of speed.