1.The wind compresses the earth's magnetic field on the dayside of the planet-the side facing the sun-and stretches the field on the nightside to form a long tail resembling that of a comet.

太陽風(fēng)在地球晝側(cè)（向陽面）擠壓磁場，將夜側(cè)磁場拉成一條長長的尾巴，就像彗星的彗尾。

2.The wind compresses the earth's magnetic field on the dayside of the planet-the side facing the sun-and stretches the field on the nightside to form a long tail resembling that of a comet.

太陽風(fēng)在地球晝側(cè)（向陽面）擠壓磁場，將夜側(cè)磁場拉成一條長長的尾巴，就像彗星的彗尾。

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.

有時，天文學(xué)家們碰巧從側(cè)面觀察到系外行星的軌道，在這種情況下，行星在圍繞恒星旋轉(zhuǎn)的時候就會交替地呈現(xiàn)出有時光面較多、有時暗面較多。