Show Volumes of Earth and Sun and their ratios

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public class Volumes
{
  public static void main(String[] args)
  {
    // Initialize a double variable to be the sun's diameter
    double sunRad = 865000.0/2.0;
    double earthRad = 7600.0/2.0;
    double fourOverThree = 4.0/3.0;
    double sunVol = 0, earthVol = 0; // You can declare a number of variables
    double ratioVol = 0;             // of the same type on a single line if you wish.

    // Find the volumes of earth and sun
    earthVol = fourOverThree*Math.PI*Math.pow(earthRad,3);
    sunVol = fourOverThree*Math.PI*Math.pow(sunRad,3);
    // Find the ratio of their volumes
    ratioVol = sunVol/earthVol;

    // Output the results
    System.out.println("Volume of the earth is " + earthVol + " cubic miles.");
    System.out.println("Volume of the sun is " + sunVol + " cubic miles.");
    System.out.println("The sun's volume is " + ratioVol +
					" times greater than the earth's.");
  }
}