1. Light travels 186,282 miles in one second. A light year is the distance light travels in one year. It is about 4.3 light years to the nearest star, Proxima Centauri, (other than our sun!)
2. How many miles away is Proxima Centauri?2.526*10^13
3. The distance from Los Angeles to New York is about2,000miles. If this distance is represented by the width of a grain of sand (say1/100of an inch), how many miles away would Proxima Centauri be?1993.3712
4. The diameter of our galaxy, the Milky Way, is about100,000 light years. With this representation used in part (b), what would the diameter of the Milky Way be (in miles under our scale)? 46358822.601
5. Imagine we now represent the Milky Way by a single grain of sand. The universe is15billion light years across. How many feet would this correspond to?