Light from the Sun takes about 8 minutes to reach Earth,
whereas light from the nearest star (other than the Sun) (Proxima Centauri)
takes about 4 years.
How many times farther is it to this star than it is to the Sun?
Answer:
One year is 365 days with 24 hours each, each of which has 60 minutes. Assuming
that the speed of light is the same everywhere, the ratio of distances is equal
to the ratio of travel times, i.e.
So, Proxima Centauri is about 260000 times farther from us than the Sun.