Glossary term: 磁場
Description: 電流會在周圍產生一個稱為磁場的影響區。反過來，帶電粒子在磁場中運動時，也會受到力的作用，除非運動方向與磁場平行。
在天文學中，許多情況下物質會發生電離，其原子會分裂成帶電粒子（以氫原子為例，會分為質子和電子）。由此產生的等離子體會產生磁場，並與磁場相互作用。
在恆星內部，運動的等離子體流通過發電機效應產生磁場。在恆星表面附近，磁場會導致恆星活動，例如黑子或耀發。恆星的磁場會在恆星表面產生黑子或耀發，被稱為恆星風的帶電粒子流會沿著磁力線向外運動。以太陽為例，構成太陽風的一些帶電粒子會到達地球，在地球磁場的作用下偏向地球的南北兩極。這些粒子使地球大氣層發光，產生極光。
磁場在其他各種天體物理環境中也發揮著重要作用，從中子星或黑洞附近的超強磁場，到影響星系氣體和等離子體大尺度運動的星際磁場，不一而足。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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