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chromosphere
Sign in to savethumb|The chromosphere emits predominantly deep red light of the Hα spectral line.
The chromosphere is a layer of the Sun's atmosphere that sits just above the visible surface and glows predominantly in deep red light. It matters because studying it helps us understand the Sun's structure and behavior, which affects space weather and conditions near Earth.
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11 sectionsContents
- Physical properties
- Phenomena
- Plage
- Spicules
- Oscillations
- Loops
- Network
- On other stars
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thumb|The chromosphere emits predominantly deep red light of the Hα spectral line.
A chromosphere ("sphere of color", from the Ancient Greek words χρῶμα (khrôma) 'color' and σφαῖρα (sphaîra) 'sphere') is the second layer of a star's atmosphere, located above the photosphere and below the solar transition region and corona. The term usually refers to the Sun's chromosphere, but not exclusively, since it also refers to the corresponding layer of a stellar atmosphere. The name was suggested by the English astronomer Norman Lockyer after conducting systematic solar observations in order to distinguish the layer from the white-light emitting photosphere.