(a) What is the ratio of the distance to the nearest galaxy to the diameter of the Milky Way Galaxy? This is typical of the distances between galaxies as compared to their diameters.
dG
dMW
=
(b) What is the ratio of the Earth's distance to the nearest galaxy to the Earth's distance to the Sun?
dG
dSun
=
(c) What is the ratio of the diameter of the Milky Way to the Earth's distance to the Sun?
dMW
dSun