Post on 13-Jan-2016
transcript
Galileo Galilei (1564-1642)
Someone who cared!
In 1610, Galileo used a telescopethat he madeto observe the heavens.
What he observed helped to prove thatthe new “heliocentric” model was
correct.
The first thing that Galileo looked at
through his telescope was
the moon.
When he turned his telescope towards Jupiter,he was surprised by what he saw…
On the next night, the arrangement of the objects had changed.
As he continued to make observations, he as amazed at the waythe pattern of objects would change.
Galileo decided to try to figure out what was going on.
You are going to repeat Galileo’s discovery…
…by watching & plotting how Jupiter’s escorts change position
from night to night.
Each one of you will be assigned 1 colored star—red, yellow, white, or blue
to watch & plot
for each night.
The four colors to choose from are:red , yellow, white , and blue.
Choose a color and write it on the worksheet.
Plot the locationof your object
by making an X on the number line
showing where it is for that night.
Night 1
J-2 -1 1 2
numbers = millions of miles to the left or right of Jupiter
Night 1
J-2 -1 1 2
Night 2
J-2 -1 1 2
Night 3
J-2 -1 1 2
Night 4
J-2 -1 1 2
Predict the locationof your object on night 5
by making a DOT on the number line showing
where you think it will be.
Night 5
J-2 -1 1 2
Mark the actual location with an X. Was your prediction close?
Predict the locationof your object on night 6
by making a dot on the number line
showing where you think it will be.
Night 6
J-2 -1 1 2
Mark the actual location with an X. Was your prediction close?
Predict the locationof your object on night 7
by making a dot on the number line
showing where you think it will be.
Night 7
J-2 -1 1 2
Mark the actual location with an X. Was your prediction close?
Predict the locationof your object on night 8
by making a dot on the number line
showing where you think it will be.
Night 8
J-2 -1 1 2
Mark the actual location with an X. Was your prediction close?
Predict the locationof your object on night 9
by making a dot on the number line
showing where you think it will be.
Night 9
J-2 -1 1 2
Mark the actual location with an X. Was your prediction close?
Now, play “X-to-X”, connecting all of the Xs
in order from night 1 to night 9.
Here is what your pattern should look
like if you are the red colored object.
J
-2 -1 1 21
2
3
4
5
6
7
8
9
J
J
J
J
J
J
J
J
Here is what your pattern should look
like if you are the yellow colored star.
J
-2 -1 1 21
2
3
4
5
6
7
8
9
J
J
J
J
J
J
J
J
Here is what your pattern should look
like if you are the blue colored star.
J
-2 -1 1 21
2
3
4
5
6
7
8
9
J
J
J
J
J
J
J
J
Here is what your pattern should look
like if you are the white colored star.
J
-2 -1 1 21
2
3
4
5
6
7
8
9
J
J
J
J
J
J
J
J
Answer questions 1, 2, and 3. Be sure to use complete sentences.
(Make sure you use NUMBERS in your answer for question #2.)
Think about question #4 and answer it using a complete sentence.
HINT: What objects do you know about that orbit planets?
So…what are the objects and what are they doing?
They are moons that areorbiting around Jupiter.
How long does it take your object
to make one revolution around Jupiter?
J
-2 -1 1 21
2
3
4
5
6
7
8
9
J
J
J
J
J
J
J
J
To find how long it takes
to orbit Jupiter,
count how long it takes
for your object to go
from the starting
position and return to the
same location.
An example is shown for
the red moon.
Start
Two
nights
One Night
Just FYI, here is some information about the objects that
we were tracking.
Earth’sMoon, Luna
Io(red)
Europa(yellow)
Ganymede(blue)
Callisto(white)
Here are what the 4 “Galilean” moons look like...
GanymedeLargest
moon in thesolar system.
It is larger than Mercury
and Pluto.
(Blue)
Callisto
Most heavilycratered object
in the solar system
It is a deadworld…
there has beenno new surface
created for4 billion years.
(white)
Jupiter with Io and Europa
EuropaAstronomers
think thatEuropa’s icy
crust is covering an
ocean ofliquid water.
It’s surfaceshows stress
from the pull of gravity from
Jupiter andother
nearby moons.(yellow)
Io
(red)
Io has thesolar system’s
most activevolcanoes,
which spewsulfur lava.
The sulfur givesIo its unusual
colors.
Jupiter with Io, Earth & the Moon
Ganymede= BlueCallista = White
Europa = Yellow
Io = Red
Homework:Finish the
“Following in Galileo’s Footsteps”worksheet.
Be sure to use complete sentencesand to put detail into your answers.