•4. How many suns would it take, laid edge to edge, to reach the nearest star?
•
•Basically, all you have to do here is divide
the distance by the diameter of the sun.
The distance is 4.28 light-years (table A-7). Convert to meters by multiplying
by 9.46x1015m per light-year (table
A-6). The diameter of the sun is 2 x radius = 14x108m (table A-6). So, the number of suns is 4 x 1016 m/14 x
108 m = 2.9 x 107 m.