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.
The nearest star is some 4.2 light years away, and that distance was known to within an accuracy of better than 0.1 light year. For a star measured as 20 light years away, the distance estimate is accurate to within a light year or so. For stars 50 light years away, the margin of error is perhaps 5 to 10 light years. Beyond 100 light years, the parallax is so tiny it cannot be measured accurately, and astronomers resort to more indirect methods to find the distances to the stars.