In "De Revolutionibus Orbium Coelestium", this Polish astronomer promoted the heliocentric
model, but used perfect circles instead of ellipses for the orbits of planets.
Copernicus
In the heliocentric model, the eastward motion of the sun through the zodiac is due to
earth revolution
Brainpower
The appearance of this in the constellation Cassiopeia in 1572 suggested change in the heavens.
stella nova (or supernova)
Until Tycho Brahe came along, observations of star and planet positions were
all of the preceeding
Since the 1577 comet showed no parallax, it refuted Aristotle because Aristotle had said that
comets were
exhalations of gas that were in the earth's atmosphere
Tycho proposed that while planets orbit the _____, the _____ orbited ________.
sun; sun; earth
Kepler's first law of planetary motions:
planets orbit the sun in ellipses
A planet is at ____ when it's farthest from the sun in its orbit.
Aphelion
Kepler's 3rd law of planetary motions:
P squared =A cubed
