Astrophysics (Index)About

chromosphere

(middle layer of the Sun's atmosphere)

The chromosphere is the layer of the Sun's atmosphere outside the photosphere and inside the solar transition region. It is a few thousand kilometers deep and its density is a hundred millionth that of the Earth's atmosphere. The inner boundary is 6000 K and the outer boundary is 35000 K, with a dip down to 3800 K between. The chromosphere is visible during a solar eclipse.

The term plage is used for certain kinds of bright regions of the chromosphere. They occur near sunspots.


(Sun,stars,stellar atmosphere)
Further reading:
https://en.wikipedia.org/wiki/Chromosphere
https://en.wikipedia.org/wiki/Plage_(astronomy)
https://solarscience.msfc.nasa.gov/feature2.shtml
https://astronomy.swin.edu.au/cosmos/C/Chromosphere
https://www.nasa.gov/image-article/layers-of-sun/

Referenced by pages:
chromospheric activity index
corona
Coronal Solar Magnetism Observatory (COSMO)
Mauna Loa Solar Observatory (MLSO)
Moreton wave
OSO 8
photosphere
plasma wave
spicule
standard model of a flare
stellar atmosphere
Sun
Sun surface features
transition region
Wilson-Bappu effect

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