The dayside has the most direct contact with the solar wind.

行星的光面(白昼侧)与太阳风有着最直接的接触。

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There are times when the field is northward and there are strong flows in the dayside polar ionosphere.

在磁场方向为北的情况下，电离层白昼侧的极地地区也有很强的能量传递。

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Sometimes, they happen to see the orbits of exoplanets edge-on. In those cases, the planet alternately shows more of its dayside and then more of its nightside as it circles its star.

有时，天文学家们碰巧从侧面观察到系外行星的轨道，在这种情况下，行星在围绕恒星旋转的时候就会交替地呈现出有时光面较多、有时暗面较多。

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