1781年3月13日，天文學家 William Herschel 使用自己製造的高倍望遠鏡，發現了行星 Uranus。
當時赫歇爾在英國觀測夜空，最初他以為自己發現了一顆彗星。但經過持續觀測後，科學家發現這個天體其實沿著行星軌道繞太陽運行。
天王星的發現具有重大意義。這是人類首次利用望遠鏡發現的行星，也是自古代以來首次新增的太陽系行星。在此之前，人類只知道五顆行星：水星、金星、火星、木星和土星。
這次發現不僅擴展了人類對太陽系的認識，也證明了望遠鏡觀測在天文研究中的重要價值，為後來更多行星與天體的發現奠定基礎。
兩百多年後，天王星仍然是太陽系中最神秘的行星之一，它以幾乎「橫躺」的自轉軸和淡藍色外觀而聞名。
English Article Version
On March 13, 1781, astronomer William Herschel discovered the planet Uranus using a powerful telescope he had built himself.
While observing the night sky from England, Herschel initially believed he had discovered a comet. However, further observations revealed that the object followed a planetary orbit around the Sun.
The discovery of Uranus was historic. It was the first planet found using a telescope and the first new planet identified since ancient times. Before this discovery, only five planets were known to humanity: Mercury, Venus, Mars, Jupiter, and Saturn.
Herschel’s discovery expanded the known boundaries of the Solar System and demonstrated the power of telescopic astronomy. It also opened the door for future discoveries of distant planets and celestial objects.
More than two centuries later, Uranus remains one of the most intriguing planets in our Solar System, known for its unique sideways rotation and pale blue color caused by methane in its atmosphere.
