Sir William Herschel discovered the planet Uranus in 1781 with a hand-made reflecting telescope.
威廉·赫歇尔先生在1781年发现天王星，用的是手工制作的反射望远镜。
In 1781, astronomer Sir William Herschel spotted an object moving in the sky and originally thought it was a comet but later realized its planetary nature.
在1781年，天文学家William Herschel爵士发现天空中有个移动的物体，一开始以为是一颗彗星，后来意识到它有着行星的属性。
In 1781, astronomer Sir William Herschel spotted an object moving in the sky and originally thought it was a comet but later realized its planetary nature.
在1781年，天文学家William Herschel爵士发现天空中有个移动的物体，一开始以为是一颗彗星，后来意识到它有着行星的属性。
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