经典科普资源 · 太空旅行者
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Hot! Hot! Hot! Venus is a planet. It is the hottest. Why? Venus has thick clouds. They trap gas.
This heats the planet. How hot is it? Lead would melt here. That is hot!
Venus is second from the sun.
It is the closest to Earth. They are almost the same size.
Look! We can see it. It is bright.
