A planetarium is a special building, or a round hall inside a museum, where you sit in the dark and look up at a curved ceiling. Lights on that ceiling make a picture of the night sky: stars, planets, the Moon, and how they move through the year.

A planetarium is a special buildingplanetarium是一種特別的建築 or a round hall inside a museum或是博物館裡的一個圓形大廳 where you sit in the dark你會坐在暗處 and look up at a curved ceiling抬頭看一個弧形的天花板Lights on that ceiling那個天花板上的燈光 make a picture of the night sky會投射出夜空的畫面 stars, planets, the Moon星星、行星、月亮 and how they move through the year還有它們一年之中怎麼移動

It is not the real sky. It is a show, often with a teacher or a recorded voice telling you what you are seeing.

It is not the real sky那不是真的天空It is a show這是一場表演 often with a teacher or a recorded voice常常會有老師或錄好的聲音 telling you what you are seeing告訴你現在看到的是什麼

People go there to learn about space on a rainy night, or in a bright city where real stars are hard to see.

People go there to learn about space大家去那裡是為了認識太空 on a rainy night在下雨的夜晚 or in a bright city where real stars are hard to see或是在燈光太亮、看不到真星星的城市裡

Though actually, speakers also use planetarium for the machine that throws the lights, not only for the building. It is a school-and-museum word. You would not use it for standing in a field and looking up.

speakers也有人 also use planetarium for the machine that throws the lights把planetarium拿來指投射燈光的那台機器 not only for the building不只是指建築物本身It is a school-and-museum word這是個跟學校和博物館有關的詞You would not use it for standing in a field and looking up站在野外抬頭看星星的時候不會用這個詞