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, podría haber sido  un planeta distante y gigante en el sistema solar exterior, pero para entonces,  esa idea era tan ridícula y había sido tan desacreditada que no me la tomé muy en serio.