IndexOutOfRangeException: Index was outside the bounds of the array.
PlayerController.FixedUpdate () (at Assets/scripts/PlayerController.cs:34)
( i speak spanish so it is a little hard for me to write code perfectly)
( i was trying to get some kind of mario galaxy / pikmin game (which the gravity always follows the closest world)
I speak Spanish too. Hola!
That means the planetas array is empty. It’s public, so I assume you wanted to assign the values in the inspector and forgot. Happens all the time 
(Completely wrong forum section, by the way, this is for UI!)
ou lo siento soy nuevo y jamas habia preguntado nada aqui