Sure, it could have been some distant, giant planet in the outer solar system, but by this time, that idea was so ridiculous and had been so thoroughly discredited that I didn't take it very seriously.
Claro, tinha de ter sido  qualquer planeta distante, gigantesco no extremo do sistema solar. Mas, nessa altura, a ideia era tão ridícula e tinha sido tão desacreditada que não a levei muito a sério.