var stars:Array =  [];
var star:Star = new Star();
this.addChild(star);
stars.push(star);
star.x=550;
star.y=490;

for(var i=0; i<stars.length; ++i)
 {
   trace(stars);
   star.addEventListener(MouseEvent.MOUSE_DOWN, clickToDrag);
   star.addEventListener(MouseEvent.MOUSE_UP, releaseToDrop);

}

function clickToDrag(e:MouseEvent):void
{
    e.target.startDrag();
    var star:Star = new Star();
    this.addChild(star);
    stars.push(star);
    star.x=550;
    star.y=490;
}

function releaseToDrop(e:MouseEvent):void
{
    e.target.stopDrag();
    if (star.hitTestObject(target))

 {
    trace("Collision detected!");
   e.target.removeEventListener(MouseEvent.MOUSE_DOWN, clickToDrag);
    }
 else
  {
    trace("No collision.");
  }
 }

var totalStars:int = 20;

for(var i=0; i<totalStars; i++)
{
   var star:Star = new Star();
   this.addChild(star);
   star.x=550;
   star.y=490;

   star.addEventListener(MouseEvent.MOUSE_DOWN, clickToDrag);
   star.addEventListener(MouseEvent.MOUSE_UP, releaseToDrop);

   stars.push(star);
}