Best Answer: Walking a mile a day would improve your general cardiovascular health. It would give you more stamina and endurance. It would help your resistance to disease. It would build muscle mass in your legs.
A summary of these methods: 1  Cepheid variable stars and their cousins the RR Lyrae stars are the primary distance indicators in the galaxy and the local group. 2  They pulsate radially (basically at the sound speed in the envelope of the star) with a period inversely proportional to the square root of the density.
But the answer really depends on if you mean large galaxies of comparable size to the Milky Way or dwarf galaxies orbiting the Milky Way. Large galaxies: Andromeda Galaxy (barred spiral galaxy) (M31) and Triangulum Galaxy (spiral galaxy) (M33) are the two nearest. M31 is larger than the Milky Way and M33 is smaller.