They first appear as a series of dots on astronomical plates, heading from saturn directly toward earth. Since the ringed planet carries no life, scientists deduce the mysterious ship to be a visitor from another star. T...They first appear as a series of dots on astronomical plates, heading from saturn directly toward earth. Since the ringed planet carries no life, scientists deduce the mysterious ship to be a visitor from another star. The world's frantic efforts to signal the aliens go unanswered.