Question

An avg diameter of a star is aprox. 10^9 m and an average of a galaxy is 10^21 m. Considerng the given data, apply a sense of scale calculation to determine if when a galaxys diamete is scaled down to the lengeth of Manahattan (21.6 km) would the star be bigger or smaller than you

Answer 1

so
10^9/x=10^21/21.6
x=2.16*10^-8 m
that's quite smaller than you. :)