Spawning bullets

1

I have made a top down shooter game in space.
I have made all of the movement.
I have come across my first problem spawning the bullets in the right place

I have made it so that the bullets spawn from the centre of the space ship but I want to know is there a way to make them a certain distance away from the space ship.

Here is the code on the main frame


var speed = 0;
var shiprotation = 0;
var rotationspeed = 0.1;
var accel = 0.1;
var maxrotationspeed = 5;
var maxspeed = 10;
var friction = 0.9;
function moveship() {
	if (Key.isDown(Key.LEFT)) {
		shiprotation -= rotationspeed;
	}
	if (Key.isDown(Key.RIGHT)) {
		shiprotation += rotationspeed;
	}
	if (shiprotation>maxrotationspeed) {
		shiprotation = maxrotationspeed;
	}
	if (shiprotation<-maxrotationspeed) {
		shiprotation = -maxrotationspeed;
	}
	if (Key.isDown(Key.UP)) {
		speed += accel;
	}
	if (Key.isDown(Key.DOWN)) {
		speed -= speed/30;
	}
	if (speed>maxspeed) {
		speed = maxspeed;
	}
	ship._rotation += shiprotation;
	xspeed *= friction;
	yspeed *= friction;
	shiprotation *= friction;
	xspeed = speed*Math.sin((ship._rotation+90)*(Math.PI/180));
	yspeed = speed*Math.cos((ship._rotation+90)*(Math.PI/180));
	map._x -= xspeed;
	map._y += yspeed;
}
var shipstate = "idle";
function changestate() {
	if (Key.isDown(Key.CONTROL) && shipstate != "guns") {
		ship.gotoAndStop(2);
	}
	if (Key.isDown(Key.CONTROL) && shipstate == "weapons") {
		ship.gotoAndStop(3);
	}
	if (shipstate == "weapons") {
		accel = 0.1;
		rotationspeed = 0.5;
	} else {
		accel = 0.5;
		rotationspeed = 0.1;
	}
}
var shootready = true;
var count = 0;
var bullets = [];
var shoottimer = 0;
var shootdelay = 0.5*30;
function shooting() {
	if (Key.isDown(Key.SPACE) && shootready == true) {
		bullet = attachMovie("bullet", "bullet"+count, count);
		bullet._x = ship._x;
		bullet._y = ship._y;
		count++;
		shootready = false;
		bullets.push(bullet);
	}
	shoottimer++;
	if (shoottimer>shootdelay) {
		shootready = true;
		shoottimer = 0;
	}
}
_root.onEnterFrame = function() {
	moveship();
	changestate();
	shooting();
};

any help will be great.

thanks