Gravitational pull in Unity

GravitationalPull.cs

// Get all the objects in range
Collider[] cols = Physics.OverlapSphere(transform.position, range);
// Assign the first object as the nearest for now
Collider nearest = cols[0];

// Loop through objects
foreach (Collider c in cols)
{
    // Get the current objects rigidbody
    Rigidbody rb = c.attachedRigidbody;
    // Get the force between the objects
    Vector3 offset = transform.position - c.transform.position;
    // Get the square of the force (distance)
    float sqmag = offset.sqrMagnitude;
    
    // if this object is closer
    if (rigidbody != rb && sqmag < nearest.transform.position.sqrMagnitude && rb != rigidbody && rb.tag != "Player")
    {
        nearest = c; //assign this as the new nearest
    }
}
// double check that we are not refering to self
if (nearest.rigidbody != rigidbody)
{
    //get the force of the nearest object
    Vector3 force = transform.position - nearest.transform.position;
    // Normalize the force
    force.Normalize();
    // Apply the force
    rigidbody.AddForce(GravityConstant * force * rigidbody.mass * nearest.rigidbody.mass / force.sqrMagnitude);
}