Neptune was predicted before it was seen
海王星先有預(yù)測(cè)后發(fā)現(xiàn)

      Neptune is the only planet in our Solar System whose existence and location was mathematically predicted before the planet was actually observed. French astronomer Urbain Le Verrier and British astronomer John Couch Adams both performed calculations to locate a possible new planet. In 1846, Le Verrir told German astronomer Johann Galle where to point Galle's telescope based on Le Verrier's calculations, and in about half an hour Galle found Neptune within one degree of its actual position--a dramatic confirmation of Newton's Law of Universal Gravitation.
      海王星是太陽(yáng)系中唯一一顆先由精確的數(shù)學(xué)推導(dǎo)預(yù)測(cè)出來(lái)，再通過觀察確定的行星。法國(guó)天文學(xué)家勒威耶和英國(guó)天文學(xué)家亞當(dāng)斯都對(duì)這顆新行星的位置做出了計(jì)算。1846年，勒威耶讓德國(guó)天文學(xué)家加勒根據(jù)自己的計(jì)算擺放望遠(yuǎn)鏡，半小時(shí)后，加勒就在勒威耶所計(jì)算的方向的一度范圍內(nèi)發(fā)現(xiàn)了海王星，完美驗(yàn)證了牛頓的萬(wàn)有引力定律。

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