How to rotate the earth

MoonsTour

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RotateEarth : MonoBehaviour {

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {
        transform.Rotate(0,1,0);
		
	}
}