Glossary term: 日冕物質拋射（CME）
Description: 日冕物質拋射（或CME）是指太陽（以及其他類似恆星）向日球層（或其他恆星的星球層）中爆炸性噴射太陽等離子體及其磁場。CME是一種磁場爆發活動，通常與太陽耀斑有關。CME是物質的物理上的拋射，與僅限於可見輻射的“耀斑”不同。CME在結構、密度和速度方面變化很大，撞擊地球的CME可能引發嚴重的地磁風暴。
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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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A Coronal Mass Ejection
Caption: A burst of solar material can be seen erupting from the Sun in this view, illustrating a coronal mass ejection (CME)—a large eruption of plasma and magnetic field from the Sun’s outer atmosphere, or corona. These CMEs are caused by magnetic explosions in the Sun's corona. During a CME, huge amounts of electrically charged particles are launched into space at great speeds, carrying part of the Sun’s magnetic field with them. These events are driven by changes in the Sun’s magnetic structure and release vast clouds of hot gas that travel outward into the solar system. When a CME moves through space, it can interact with a planet’s magnetic field and atmosphere, sometimes creating spectacular auroras or, in strong cases, interfering with artificial satellites and power systems.
CMEs are often associated with a temporary brightening of the region of the Sun where the CME originated. This is known as a solar flare. Stars other than the Sun can also have CMEs and flares.
This image was taken by NASA's Solar Dynamics Observatory (SDO). This is a space mission to monitor the Sun. The image here is taken at a special wavelength which partially ionised helium emits strongly at.
Credit: NASA/Goddard/SDO
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