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適合人群：中級水平的英語學習者

課時時長：2分鐘左右

Astronomers have promoted Saturn as the planet with the most moons. Saturn has overtaken the solar system's largest planet Jupiter as the "king of the moons". The astronomers recently discovered 20 new moons orbiting Saturn, which brings the planet's total number to 82. This edges out Jupiter, with 79 celestial bodies, into second place. Each of the newly-discovered moons is at least 5km in diameter. Seventeen of them orbit Saturn backwards and take more than three years to complete one orbit of Saturn. The astronomers found the moons using the powerful Subaru telescope, located on Hawaii. The research team will now look for moons that are around a kilometer in diameter.

天文學家認為土星是擁有衛星最多的行星。土星已經取代太陽系最大的行星木星，成為「衛星之王」。天文學家最近發現了20顆圍繞土星運行的新衛星，使土星的衛星總數達到82顆。這將擁有79個天體的木星擠到了第二位。每個新發現的衛星直徑至少有5公里。其中有17顆衛星是反向繞土星運行的，而完成一顆土星的軌道需要3年多的時間。天文學家使用位於夏威夷的強大的斯巴魯望遠鏡發現了這些衛星。研究小組現在將尋找直徑約一公里的衛星。

Lead astronomer Dr Scott Sheppard commented on the perceived origins of the new moons. He said: "We don't think they formed with the planet. We think they were captured by the planet in the past." He posited that Saturn sucked in a swirling mixture of gas and dust to form the moons. Dr Shepperd added: "We think these moons interacted with that gas and dust. These were comets or asteroids that happened to be passing by....They were captured into orbits around the planet rather than falling into the planet. We think these are the last remnants of what formed Saturn." The moons will be named in a competition after giants from Gallic, Inuit and Norse mythology.

首席天文學家斯科特·謝潑德博士對新月的起源進行了評論。他說:「我們認為它們不是由行星形成的。我們認為它們在過去曾被地球捕獲。」他假設土星吸入了一種旋轉的氣體和塵埃混合物，形成了衛星。Shepperd博士補充道:「我們認為這些衛星與氣體和塵埃相互作用。這些是碰巧經過的彗星或小行星。它們被捕獲進入圍繞行星的軌道，而不是落入行星。我們認為這些是土星形成的最後殘餘。」這些衛星將在一次競賽中以來自高盧、因紐特和挪威神話的巨人來命名。