Making an object rotate around a sphere

Questions & Answers
1

I’m trying to make a ship sail around a sphere but i’m having some issues turning it when i need too. The code i have makes it sail perfectly in a straight line around the sphere but the moment i need it to turn it flips out.

If i comment out the transform.rotation in the Update() and use RotateTowards(). It will turn towards the target but it wont align the ship with the surface. If i leave that line uncommented anything RotateTowards does is ignored.

void Update()
{

    GetFSM().Update();
	
    lastPosition = transform.position;

    Vector3 newPos = lastPosition + transform.rotation * ForwardSpeed * Time.fixedDeltaTime * 0.1f;//
    newPos = newPos.normalized * altitude;
	
    transform.position = newPos;
    transform.rotation = Quaternion.FromToRotation( Vector3.up, newPos ) * Quaternion.Euler(0, angle, 0);*/
}

public void RotateTowards (Vector3 targetPos) 
{		
	Vector3 relative  = transform.InverseTransformPoint( targetPos );
    angle = (Mathf.Atan2(relative.x, relative.z) * Mathf.Rad2Deg) * Time.deltaTime ;

	transform.Rotate (0, angle * Time.deltaTime, 0);
}
2

I don’t see why have all that but if your just orbiting just make an empty gameobject and place it as a child so you can use it as a rotation point and attach this and it should work just fine.
public int rotSpeed;

void Update ()
{
	transform.Rotate(rotSpeed * Time.deltaTime, 0, 0);
}

hope this works for you