Answer Keys (Approimate rounded values but will vary from source to source.)
Solar System Information Chart:
Planet/
 Dimension		 * Radius
(km.)		 * Diameter 
(km.)		 Average Distance 
From the Sun (km.)
 10e8 means 10 to 8th		 Distance 
in  (A.U.)		 Rotational 
Period in
(earth days)		 Period of 
Revolution
in earth yrs.
Mercury  2440 4880 or
4.9 x 10e3		  57,909,000 or
5.8 x 10e7		  0.4  58.6  0.24
Venus  6052  12,100 or
1.2 x 10e4		  108,209,000 or
1.1 x 10e8		  0.7  243 
backwards		  0.62
Earth
  6378  12,760 or
1.3 x 10e4		  149,598,000 or
1.5 x 10e8		  1.0  0.99  0.99
Mars
  3397  6790 or
6.8 x 10e3		  227,937,000 or
2.3 x 10e8		  1.5  1.03  1.88
Jupiter
  71,492  143,000 or
1.4 x 10e5		  778,412,000 or
7.8 x 10e8		  5.2  0.41  11.86
Saturn
  60,268  120,500 or
1.2 x 10e5		  1,426,725,000 or
1.4 x 10e9		  9.5  0.45  29.42
Uranus
  25,559  51,100 or
5.1 x 10e4		  2,870,972,000 or
2.9 x 10e9		  19.2  0.72
backwards		  83.75
Neptune
  24,764  49,500 or
5.0 x 10e4		  4,498,253,000 or
4.5 x 10e9		  30.0  0.67  163.72
**Pluto
  1137  2270 or 
2.3 x 10e3		  5,906,376,000 or
5.9 x 10e9		  39.5  6.39
backwards		  248.02
**Pluto has the most divergent values listed in various reference sources due to lack of exploration there.
Look at chart to determine rankings.     19667 sec. to travel to Pluto at speed of light
Measurements for Scale Model:
Planet Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto
distance - M. 0.4 0.7 1.0 1.5 5.2 9.5 19.2 30.0 39.5
diameter
- cm.		 0.4 0.9 1.0 0.5 11.2 9.5 4.0 3.9 0.2
How Long?
Mercury __193__,  Venus __367__,  Earth __500__, Mars __767___, Jupiter __2600__,

Saturn __4667__, Uranus __9667__, Neptune __15000__, Pluto __19667__  (all sec.)
 

Mercury __307__, Mars __267___,  Jupiter  ___2100__, Pluto __19167__  (all sec.)
 

Mercury __10.2___, Mars __8.9___,  Jupiter  __70__, Pluto __638.9___   (all min.)
 

Jupiter -  1.2 hr.  &   Pluto - 10.7 hrs.

                    How long would it take to send a message to a star that was 8 light-years away? ___8 yr.____
And how long would it take to get the answer back? ___8 yr.______