求翻译以下文章

求翻译以下文章

THE BLUE PLANETS FOR MILLENNIA . PEOPLE KNEW ONLY THE INNERMOST FIVE PLANETS , SO IT WAS A GREAT SURPRISE WHEN WILLIAM HERSCHEL STUMBLED UPON URANUS IN 1781 - A DISCOVERY THAT TRIGGERED THE HUNT FOR MORE HIDDEN WORLDS The discovery of uranus and , later , neptune was all the more surprising because these planets were giants , four times wider than Earth . ever since , astronomers have continued to scour the skies for new planets . many smaller worlds have been found , including pluto , but these are now classed as dwarf planets or kuiper belt objects Careful study of the orbits of these dista nt lu
几千年来的蓝色星球。人们只知道最里面的五颗行星，所以一个巨大的惊喜，当威廉赫歇尔发现天王星在1781发现触发寻找更多隐藏的世界，后来发现这是天王星，海王星是更令人惊讶的因为这些行星是巨人，比地球的四倍。自那以来，天文学家们一直在不断地搜寻新行星的天空。许多较小的世界被发现，包括冥王星，但这些现在被归类为矮行星或柯伊伯带天体的轨道仔细研究这些远缘路
Late 20 century Anthropocene a new name , anthropocene , is proposed for the modern era . during which human activity has begun to have a profound effect on the planet , its climate , and its natural ecosystems . 20世纪后期人类纪的一个新的名字，“人类世”，提出了现代的时代。在人类活动已经开始对地球，它的气候，和它的自然生态系统产生深远的影响。追答1980 Explaining the extinction of dinosaurs us physicist luis alvarez and others propose that a large asteroid or comet impacting earth 65.5 million years ago at the end of the cre cretaceous period ) caused extinction of the dinosaurs and many other animal and plant groups
1980解释恐龙灭绝的美国物理学家路易斯阿尔瓦雷斯和其他人提出了一个大的小行星或彗星撞击地球6550万年前的白垩纪末期）CRE导致恐龙和其他许多动物和植物群的灭绝。
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