九大行星地球的主要问题
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行星地球
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物理|小行星会撞地球吗?
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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【恐龙课堂】小行星撞地球
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第300集 神器一出,行星撞地球
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系外行星新发现:距地球26光年,发现一个2.8倍地球大小岩质星球
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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小行星贝努样本舱即将到达地球
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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成功预报:一小行星撞击地球!
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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对地球生命极具威胁的小行星带
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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【俗说星球】揭秘最像地球的系外行星
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178宇宙奥秘:地球的“亲戚”——类地行星
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734 - 外星人早已发现地球?有29颗宜居行星能看到地球
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1188 - 宇宙超级行星有多大?是地球的45万倍
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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130 第九大行星
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99.【微档案】对地球有威胁的近地小行星
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IMAX首部原创院线电影《小行星猎人》,逼真呈现小行星撞击地球景象
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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145 小行星撞地球
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06红鞋之恋1行星撞地球
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天降之任【356集】小行星撞地球
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X行星:太阳系的第九大行星
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【自然】为什么大家都怕小行星撞地球?
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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“棉花糖”行星,密度最小的系外行星,质量是地球30倍
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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小行星贝努样本舱即将到达地球
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
第九行星
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![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
直径约1.77KM小行星今天掠过地球
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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11月29日英语: 2022年小行星要撞地球?
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
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【未解之谜020】碰撞地球的最大陨石和小行星
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
捕捉第九大行星
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
我们如何发现悄悄靠近地球的小行星?
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
596 - 比地球更完美的行星存在吗?
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)
已知宇宙中最大的行星,HD100546b,是地球的45万倍!
![](https://imagev2.xmcdn.com/storages/9ebe-audiofreehighqps/DC/57/GKwRIMAIzIMUAAAL5gJV7dG9.jpg)