If you were making a scaled model of the milky way galaxy what scalig factor might you use?

When will the space end? Why are solar solar panels rectangle? What is the highest aura color? Why is Albert Einstein worth knowing about? Who discovered Sun Spots in 1608? Which constellation represents the mythological creature of a centaur drawing his bow and arrow? What is the average temperature of the Milky Way galaxy? What is the problem with the heat shield cracking in Apollo 13? Which is the brightest Alcyone Alpheratz Deneb Rigel? Which planets take longer then earth to complete one rotation? How many grams are in a Milky Way? Why is it clear night is more cooler than a cloudy night? A star turns matter into energy in what process? Is life suitable for Jupiter? What is One elliptical orbit of earth around the sun called? What scientists believe the greatest scientific discovery of all time is? Why do scientists make and record observations? Who regarded as the father of the 'science fiction'? How many lightyears are in the Milky Way? How long can solar power be stored for?