ACTIVATING STRATEGY:
On your notes write out your address…
what country…
AfterNow
today’s
lesson, you
should be
able
to
answer
all
of
What continent…
these questions and more!
What planet…
What galaxy?
HOW IS OUR SOLAR SYSTEM
POSITIONED IN THE MILKY WAY
GALAXY AND THE UNIVERSE?
S6E1b. Describe the position of the solar system in the Milky Way Galaxy and
the universe.
LET’S REVIEW
Turn to a seat partner and
discuss the theory on how
the universe was formed.
THE BIG BANG THEORY
The most commonly accepted theory today
of the formation of the universe is the Big
Bang Theory.
The theory states that the universe
originated sometime between 10 billion
and 20 billion years ago from an
enormous explosion of a small volume of
matter at extremely high density and
temperature.
Let’s review the
formation of other
objects within the solar
system.
THE UNIVERSE AFTER ITS BIG BANG…
AsScientists
millions of
believe
yearsthat
passed,
Solarthe
Systems
dense formed
areas
In
short,
after
the
Big
Bang,
Further
away
from
the
center
of
this
mass
of
in similar
the universe
ways. pulled
Giant clouds
in material
of dust
because
andwhere
gas
the they
star
was
forming,
there
were
smaller
clumps
dense
clouds
ofFinally,
gas
and
dust
began
had
to
more
collapse
gravity.
under
the
weight
about
100
of
its
At the center of this spinning cloud, a small
of
dust
and
gas
that
were
also
collapsing.
from
the
“bang”
either
collapsed
million
own
years
gravity.
after
As
the
it
did
Big
so,
Bang,
the
matter
thelarger
gas
star began to form. This star grew
or
stuck
together
to
form
the
became
contained
within
and
dense
it began
enough
to move
for the
inmore
aforming
first
giant
and
larger
as
it collected
more
and
of
The
star
in hot
the
center
eventually
ignited
stars
circle,
to
much
form.
like
Large
the
clusters
water
inof
a stars
drain
soon
moves
ofthe
the
universe
we
know
theparts
dust
and
gas
that
collapsed
into
it. the
our
Sun,
while
smaller
clumps
became
aroundminor
became
the center
thetoday.
of
first
the
galaxies.
draincomets,
in a circle.
planets,
planets,
moons,
and
asteroids.
The Universe contains billions of galaxies, each
containing millions or billions of stars.
Therefore, the galaxy in which our solar system
and essentially all of us live, is just one of
billions.
Distributed Summarizing: Turn to a seat
partner and come up with a comparison of
our galaxy within the universe.
Our galaxy is called the Milky Way Galaxy.
THE MILKY WAY GALAXY


Contains single
star systems,
double stars, and
dust and gas
It is a spiral galaxy
because it has
spiral arms that
wind outward from
the center
THE MILKY WAY GALAXY



Why is our galaxy called the Milky
Way?
Thousands of years ago people
thought the stars appeared as a
patchy band of light like a flowing river
of milk, thus the name Milky Way.
Also, the word galaxy comes from the
Greek word gala, meaning milk.
OUR SOLAR
SYSTEM
Our solar system is a
single star system
located on an outer
rim (arm) of the
Milky Way Galaxy.
OUR SOLAR SYSTEM
Here is another view of the location of our
solar system in the Milky Way Galaxy.
STUDY JAMS: THE
SOLAR SYSTEM
SCALE OF THE UNIVERSE
ANIMATION
DIGITAL UNIVERSE
EXAMINE THE MILKY WAY
GALAXY AT DIFFERENT SCALES
DISTRIBUTED SUMMARIZING:
The map to the right shows
Troup County. The lines and
numbers represent
interstates and major roads
running through Troup
County.
Imagine that the circle in the
middle of the map is the
center of the Milky Way
Galaxy. Draw an asterisk (*)
showing where the Solar
System might be located on
our Troup County map.
SUMMARIZING STRATEGY
Universe
Match-up