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。
2
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。
3
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.