The biggest cameracamera/ˈkæmərə/L1用来拍照的机器a machine that takes pictures in the world is on a mountain in Chile. It is called the Vera C. Rubin Observatoryobservatory/əbˈzɜːrvətɔːri/L2天文台，用于观测天文的建筑或设施a building or place with special equipment for watching the stars and planets. The camera is as big as a small car. It takes one picturepicture/ˈpɪktʃər/L1照片；图像something you see when you take a photo every 30 seconds. It will do this every night for ten years. Scientists can put the pictures together to make a movie of the sky.
Scientists are very excitedexcited/ɪkˈsaɪtɪd/L1非常高兴和期待的feeling very happy and interested about something because they can see new things like stars and galaxies. The camera can also see dark matter. Dark matter is invisible stuff in space. This surveysurvey/ˈsɜːrveɪ/L2调查；勘测a careful study of an area or group of things to collect information will help us learn more about the universeuniverse/ˈjuːnɪvɜːrs/L2宇宙，包括所有星系、恒星、行星和空间everything that exists, including all stars, planets, and galaxies.
