We see it [the as-yet unseen, probable new planet, Neptune] as Columbus saw America from the coast of Spain. Its movements have been felt, trembling along the far-reaching line of our analysis with a certainty hardly inferior to that of ocular demonstration.
William HerschelI have looked further into space than ever human being did before me. I have observed stars of which the light, it can be proved, must take two million years to reach the earth.
William Herschel