Glossary term: 等離子體
Description: 等離子體是一種準中性的（即電荷平衡的）氣體，其中相當一部分粒子是帶正電的離子和帶負電的電子，通常與分子和中性原子混合在一起。等離子體的性質與普通的中性氣體截然不同，因此等離子體被認為是“物質的第四態”。帶正電的離子和帶負電的電子使等離子體能夠導電。等離子體可以在高溫下形成（如恆星中），也可以通過光緻電離形成（如星際氣體中）。等離子體存在於恆星、星際介質、太陽系行星之間的空間（以太陽風的形式）、行星磁層以及星系之間的空間中。據估計，可觀測宇宙中 99% 以上的普通物質（不包括暗物質和暗能量）都處於等離子態。
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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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