Lesson 1 & 2 Big Bang Our Position in the Solar System
Heliocentric & Geocentric Models
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Lesson 1: Heliocentric & Geocentric Models Standard S6E1.a
Relate the Nature of Science to the progression of basic historical
scientific theories (geocentric and heliocentric) as they describe
our solar system and the Big Bang as it describes the formation of
the universe.
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Lesson 2: Our Position in the Solar System Standard S6E1.b
Describe the position of the solar system in the Milky Way galaxy
and the universe.
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What created all of this?
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What created all of this?
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Big Bang Theory that the universe was produced by a great
explosion.
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Inside our universe..
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After Big Bang, the universe was created. There were gases
called helium and hydrogen that were left over. 200 million years
later, these gases came together to form the first stars
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Gravity drew these stars together into families of stars called
GALAXIES We live in one of these galaxies.
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There are galaxies.
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Galaxy
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Galaxy
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Galaxy
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Galaxy
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Galaxy
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Clumps of material began to form in the center of the spinning
matter. Gravity drew more and more material in ward. As the clump
grew larger, so did the amount of pressure, which created
tremendous amounts of heat. This formed our sun. During the next
10-100 million years, grains of dust around the sun collided into
one another. Many stuck together and eventually formed the 9
planets, moons, asteroids, comets, and space rocks.
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Clumps of material began to form in the center of the spinning
matter. Gravity drew more and more material in ward. As the clump
grew larger, so did the amount of pressure, which created
tremendous amounts of heat. This formed our sun. During the next
10-100 million years, grains of dust around the sun collided into
one another. Many stuck together and eventually formed the 9
planets, moons, asteroids, comets, and space rocks.
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Galaxy Fill in Chart about the formation of the Solar
System.
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Galaxy Milky Way Galaxy There are 300 billion stars in this
galaxy. Our sun is one of them.
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Galaxy This is the Milky Way Galaxy. Our solar system is inside
the Milky Way galaxy.
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Galaxy The Milky Way Galaxy has a spiral shape. It is shaped
like a giant flattened disk with a bulge in the middle (think of a
fried egg sunny-side up).
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Galaxy Where are we? Our sun and solar system is on one of the
outer arms of the Milky Way galaxy.
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Galaxy
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How BIG is our galaxy? 100,000 light years in diameter What is
a lightyear? : distance light travels in a year. In km 1 ly=9.5
trillion, billion km.
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Astronomical unit: distance between the sun and the Earth.
(150,000,000 km)
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(150,000,000 km)=93,205,680mi
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Early Ideas about our Solar System
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Heliocentric Model
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The idea that the objects in the solar system revolve around
the Sun. Helios in Greek = sun (Made sense, sun rose the east and
set in the west).
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Geocentric Model The idea that the objects in the solar system
revolve around Earth. Geo in Greek= Earth
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Geocentric Model
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LISTEN fill in the blanks on your notes. This is your WORD BANK
1.Geocentric 2.Heliocentric 3.Sun revolves around Earth 4.Galileo
5.Copernicus
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For centuries people believed that ___________ revolved around
___________. This was the ____________ Model.
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__________was the first scientist to think that the sun was the
center of the solar system.
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_________ tested this theory, observing Jupiter and Venus.
_________ concluded that the sun was the center of the solar
system.
