Transcript Heliocentric Model of SS

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Perihelion – when a planet is closest to the sun in its
orbit.
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Aphelion – when a planet is farthest from the sun in its
orbit.
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Ellipse – the oval shaped path that a planet takes around
the sun.
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Geocentric Model of SS – Earth is at the center of the SS
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Heliocentric Model of SS – Sun is at the center of the SS
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Roman Astronomer, mathematician, and
geographer
Thought Earth was at the center of the solar
system (Geocentric model
of the SS)
Thought that all the
planets traveled in smaller
circles, called epicycles.
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Scientist during time of Renaissance
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Thought the sun was the center of our SS
(Heliocentric model of SS)
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Also proposed the idea that Earth was tilted
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He and his followers had to study in secret
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He was the first to use telescopes to observe
space
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He discovered 4 moons around Jupiter
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He discovered the phases of Venus
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He observed the surface of the moon and the
sun.
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Built an observatory and recorded the
positions of the stars and planets for 20 years.
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At age 20, he was in a duel and lost part of his
nose. He wore a metal insert over the missing
part.
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Brahe’s assistant and
mathematician
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Published the Laws of
Planetary Motion in
1609 – 1618.
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Kepler's First Law of Planetary Motion states
that the orbits of the planets are ellipses with
the sun at one focus of the ellipse.
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Equal Area Law - states that a line from a
planet to the sun will sweep out equal areas in
equal times. The planet moves more slowly
when it is farther from the sun and faster
when it is near it.
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Harmonic Law – states that the farther a
planet is from the sun, the slower its speed
and the longer its period of revolution.
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The Universal Law of Gravitation states that
the force of gravity between two objects is
dependent on the mass of the objects and
their distances from each other.
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Perihelion – when a planet is ___________ to the sun in
its orbit.
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Aphelion – when a planet is ___________ from the sun
in its orbit.
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Ellipse – the oval shaped path that a ________ takes
around the _______.
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Geocentric Model of SS – ________ is at the center of
the SS
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Heliocentric Model of SS – _________ is at the center of
the SS
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________ Astronomer, mathematician, and
geographer
Thought ______ was at the center of the solar
system (_________ model
of the SS)
Thought that all the
planets traveled in smaller
circles, called __________.
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Scientist during time of ________________
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Thought the ______ was the center of our SS
(____________ model of SS)

Also proposed the idea that _____ was
______

He and his followers had to _______ in secret

He was the first to use ___________ to
observe ______

He discovered 4 moons around ________
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He discovered the __________ of Venus
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He observed the ________ of the _______
and the _______.

Built an ___________ and recorded the
positions of the _______ and _________ for
20 years.

At age 20, he was in a _____and lost part of
his ______. He wore a metal insert over the
missing part.

Brahe’s _________ and
mathematician

Published the _____ of
Planetary ______ in
1609 – 1618.

Kepler's First Law of Planetary Motion states
that the ______ of the planets are ______
with the _____ at one focus of the ellipse.
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______ Area Law - states that a line from a
planet to the sun will sweep out _____ areas
in equal times. The planet moves more
______ when it is farther from the sun and
______ when it is near it.
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_________ Law – states that the _______ a
planet is from the sun, the slower its ______
and the longer its period of __________.
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The __________ Law of Gravitation states
that the force of _______ between two
objects is dependent on the _____ of the
objects and their _______ from each other.