输入要查询的单词:
subsolar point
查词链接:
https://www.dute.org/dict/subsolar_point
复制链接 日下点
太阳直射点
查看英英释义
abstract:
The subsolar point on a planet is where its sun is perceived to be directly overhead (in zenith), that is where the sun's rays are hitting the planet exactly perpendicular to its surface. It can also mean the point closest to the sun on an object in space, even though the sun might not be visible.
网络释义
日下点
... 至于现象成因,由于地球旋转,太阳直射点会在南北回归线之间移动。当太阳垂直照射在地球上某一地点时,该处即为日下点(subsolar point),所有直立物体的影子,都会在该物的正下方成像,感觉就像影子不见了一样。
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