Ch 4 History Of Space Flashcards
V: moves east and West in 24 hours.
Moves north and south along the horizon.
Moves west to east among the fixed stars.
Goes through phases on a regular cycle.
Moon
V: first day of summer, longest day of light
Summer Solstice
V: September 22nd -first day of fall
Equal day and night
Autumnal Equinox
V: 1st day of winter -Dec 21st
Shortest day light hours
Winter Solstice
V: 1st day of Spring
Equal day and night
Vernal Equinox
V: Moves east to west in 24 hours.
Moves north and south along the horizon.
Moves west to east on among the fixed stars.
Planet
V: 5 planets visible within the unaided eye
Mercury Venus Mars Jupiter Saturn
V: At times planets appear to stop and move backwards in the sky
Retrograde Motion
V: Fixed in A giant sphere around the earth
Sphere makes one complete rotation every 24 hours
Stars
V: The motions in the heavens were around a centrically located Earth motion of all, heavenly bodies had to be in perfect circles and at a constant speed
Geocentric Model
Person: 400BC 1st to come up with geocentric model
Plato
P: added additional spheres to Plato’s model
Aristotle
P: use the teachings of Aristotle to convince the Catholic to adopt the geocentric model as dogma of the church
Thomas Aquinas
Vocabulary: Moves East to West in 24 hours.
Moves north and south along the horizon.
Moves West to east among the background rate of 1° per day (direct motion)
Sun