Check out example codes for "unity rotate around axis". It will help you in understanding the concepts better.

Code Example 1

transform.Rotate(axis, degrees);

Code Example 2

using UnityEngine;//Attach this script to a GameObject to rotate around the target position.
public class Example : MonoBehaviour
    private Vector3 target = new Vector3(5.0f, 0.0f, 0.0f);    void Update()
        // Spin the object around the world origin at 20 degrees/second.
        transform.RotateAround(target, Vector3.up, 30 * Time.deltaTime);

Learn ReactJs, React Native from