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Vocabulary 
Term
Knowledge
Connections
Heresy
Excommunication
Definition
Picture
Essential Question
How did the Catholic Church react to
new ideas in astronomy?
Who was Copernicus?
 His ideas would changed the way
people viewed the universe
 Was the first to disagree with
Ptolemy
NICOLAUS
COPERNICUS
Polish Mathematician
 Proposed a HELIOCENTRIC
universe
Sun
centered
What did the Church have to say?
Copernicus realized his ideas would cause a conflict with
the church…
He could face arrest of
EXCOMMUNICATION
Being thrown out
of the church
He worked in secret and did not publish his
ideas until near the end of his life
Did anyone believe Copernicus?
 Supported Copernicus’
theory
 Used mathematical formulas
to show planet orbits
JOHANNES KEPLER
German Mathematician
 Was a Protestant – so he did
not fear the Catholic Church
What was Galileo's role?
► Lived in Italy – the home of
the Catholic Church
► Built an improved telescope
► Discovered clear evidence of
a heliocentric universe
GALILEO GALILEI
Italian scientist
How did the Church feel about Galileo?
When Galileo published his findings, the Catholic Church
charged him with HERESY
anti-church
teachings
He was placed on house
arrest, his books were
burned, and he did the
rest of his work in secret
But, it was too late – his ideas would spread rapidly
around the world!
Essential Question
How did the Catholic Church react to
new ideas in astronomy?
CHARACTER = CATHOLIC CHURCH IN GALILEO’S TIME