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The model uses two scales: one for the size of the astral bodies and another for the distance from the sun.
Astral Body scale is 1 centimetre = 20,078 km
Distance from the sun scale is 1 metre = 2,007,800 km
 
This means that the Sun and the planets of the solar system would be represented like this:
 
Astral
Body
Size
Distance
Actual
(km)
Scaled
(cm)
Actual
(km)
Scaled
(m)
Sun
13,774,000
68.60
The Sun is the Solar System Centre
Mercury
         4,216
  0.21
     58,137,859
      28.96
Venus
       12,750
  0.64
   107,096,052
      53.34
Earth 
       12,750
  0.64
   149,942,504
      74.68
Mars
         6,375
  0.32
   226,439,684
   112.78
Jupiter
      137,695
  6.86
   777,219,380
   387.10
Saturn
      117,296
  5.84
1,425,919,482
   710.19
Uranus
        50,998
  2.54
2,870,170,178
1,429.51
Neptune
        45,898
  2.29
4,498,034,184
2,240.28
Pluto
          2,122
  0.11
5,914,757,942
2,945.89
 
To fully feel the effect of this model, cut out the scaled models of the Sun and planets from pieces of cardboard. Then ask your parents to accompany you and a few of your friends to a nice straight country road for a great experiment party.

Don't forget to bring along a measuring tape and if you happen to have walkie-talkies or binoculars, that would add some excitement to the adventure. Once on site, get a friend to hold the Sun and, using the above table, measure the distance between him/her and the first planet then post another friend holding Mercury at that spot and measure the distance to the following planet and repeat the process until the last planet is in place. The car odometer will be useful at one point, you'll see.

Can you see the Sun from Pluto? How many planets can you see from the Sun? Imaging blowing up the distances for the real thing while you and your friends are now sitting on the planets. Do you start to get weird and funny feelings about astronomical distances?

We hope you'll enjoy the experience! See you on the other side of the Moon.


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