&gt; Alpha Centauri is about four miles away.<p>Actually, around 500 miles.<p>Distance to Alpha Centauri: 4.37 light years = 276,364 astronomical units.<p>In your diagram, the Earth is 10 feet from the Sun. Multiply by 276,364 to get 2,763,640 feet, or 523 miles.<p>The scale jump from distances around the Solar System to the next closest star is mind boggling.