Remote sensing in ultraviolet and vacuum ultraviolet can help us recognize many spatial phenomenon , such as dayside and nightside airglow , aurora . so it ' s very important 因此，紫外-真空紫外波段的空间遥感探测对认识太阳和地球大气以及宇宙空间具有重要的应用价值。
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 太阳风在地球昼侧（向阳面）挤压磁场，将夜侧磁场拉成一条长长的尾巴，就像彗星的彗尾。
3.
Reconnection is most efficient when the imf has a component that is directed southward ? that is , opposite to the northward direction of the earth ' s magnetic field at the dayside of the magnetosphere 在磁层昼侧，若imf有南向分量，也就是和北向的地球磁场方向相反，则磁力线重连的效率最高。
4.
When reconnection is initiated on the dayside magnetopause , the interconnected imf and geomagnetic field lines are swept back by the solar wind over the earth ' s poles , pouring energy into the northern and southern lobes of the long magnetotail on the nightside 当磁力线重连在昼侧的磁层顶上开始发生，连在一起的imf和地球磁场磁力线便被太阳风往后吹，扫过地球南北极，把能量灌入长磁尾的南北两叶。
5.
Just as the passage of a supersonic jet through the atmosphere produces a shock wave , the encounter of the solar wind with the magnetosphere forms a shock wave ? known as the bow shock ? some 13 , 000 kilometers upstream ( that is , closer to the sun ) from the dayside magnetopause 就像超音速喷射机在大气层飞行时会产生震波，当太阳风碰上地球磁层，也一样会产生震波，我们称之为弓形震波，产生位置约在昼侧的磁层顶外13000公里处。
