ScienceCasts: 惊艳的日落天空秀

金星和木星将在6月底齐聚一堂,上演一场不可错过的亲密接触。这可能是2015年最好的后花园天空秀。 访问,了解更多 点击这里查看更多视频: 这是2015年的视频

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