public class Planet{

    private static final double EARTH_RATIO = 6.7948e-12;
    private double radius;
    private double mass;
    private String name;

    public Planet (String n, double r, double m){
	name = n;
	radius = r;
	mass = m;
    }

    public String getName(){
	return name;
    }

    public double getRadius(){
	return radius;
    }

    public double getMass(){
	return mass;
    }

    public double computeWeight(double w){
	return w * mass * EARTH_RATIO / (radius*radius);
    }
}