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Stellar corona
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A corona is the outermost layer of a star's atmosphere. It is a hot but relatively dim region of plasma populated by intermittent coronal structures known as solar prominences or filaments.
The solar corona with its coronal streamers streaching out, as well as solar prominences (in red) along the limb of the earthshine illuminated Moon du
The solar corona with its coronal streamers streaching out, as well as solar prominences (in red) along the limb of the earthshine illuminated Moon during a total solar eclipse.
Image from TRACE at 171Å wavelength (extreme ultraviolet) showing coronal loops
Image from TRACE at 171Å wavelength (extreme ultraviolet) showing coronal loops
Image taken by the Solar Dynamics Observatory on October 16, 2010. A very long filament cavity is visible across the Sun's southern hemisphere.
Image taken by the Solar Dynamics Observatory on October 16, 2010. A very long filament cavity is visible across the Sun's southern hemisphere.
On August 31, 2012, a long filament of solar material that had been hovering in the Sun's outer atmosphere, the corona, erupted at 4:36 p.m. EDT
On August 31, 2012, a long filament of solar material that had been hovering in the Sun's outer atmosphere, the corona, erupted at 4:36 p.m. EDT
Stellar atmosphere
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The stellar atmosphere is the outer region of the volume of a star, lying above the stellar core, radiation zone and convection zone.
Photo taken in France during the 1999 solar eclipse
Photo taken in France during the 1999 solar eclipse