Although there are 100 to 200 billion other galaxies in the Universe, the galaxies are relatively close together. The next scale factor brings the whole visible universe into the model, by letting a sphere of size E (4mm diameter) represent the whole Milky Way galaxy.
Step 1. Establish a scale for your JOB 4 model|
Make a ratio of the actual diameter of the Milky Way galaxy to the diameter of the model of the Milky Way galaxy
(Be sure units are the same in the numerator and denominator before canceling them)
SCALE = ____________ / _____________    =   [ ___________ ] : 
The SCALE of this model is: [ _____________ ] : |
The Scale factor is _________________
Question (A): How far is it to the Andromeda galaxy in your JOB 4 model?|
The distance in the JOB 4 model will be the actual distance to Andromeda, divided by the scale factor.
Solution: The distance to Andromeda in your model is: _____________ / ___________ = _________
In your JOB 4 model, the distance to the Andromeda galaxy will be _____m or ____cm.|
Name an object that is approximately this big ________________
Question (B): The farthest object observed so far (a quasar) is over 12 billion light years away. How far is it to that quasar in your JOB 4 model?|
Distance to the quasar in your model is the actual distance to the quasar, divided by the scale factor.
Solution: Distance to the quasar in your model is: _____________ / ___________ = _________
In your JOB 4 model, the distance to the farthest object ever observed|
is________m; or ____ times the length of a football field.
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