corona

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  • noun

Synonyms for corona

the outermost region of the sun's atmosphere

(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower

one or more circles of light seen around a luminous object

(anatomy) any structure that resembles a crown in shape

a long cigar with blunt ends

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References in periodicals archive ?
The presence of 'anchoring' within coronal holes and the rigid rotation of the corona is best explained by condensed matter.
Coronal holes are dark, low density regions of the sun's outermost atmosphere, the corona.
The holes, called coronal holes, are gateways for solar material and gas to spill out into space, according to space.
In contrast to recent minima, it displayed low sunspot numbers, a delayed new-cycle activity, weak polar magnetic fields, and smaller polar coronal holes with less open flux.
SXI will observe solar flares, coronal mass ejections, coronal holes and active regions in the X-ray region of the electromagnetic spectrum.
These dark-appearing, open regions, known as coronal holes, permit solar wind to escape into space.
The NRL researchers think that future studies of these cellular regions will lead to an improved understanding of magnetic field line reconnection at the boundaries of coronal holes, and how these changes are transmitted outward into the solar wind.
This may also be true when comparing the atmosphere of the quiet Sun near the solar poles with that above the equator, as a result of coronal holes above the former.
It would seem that many displays have been initiated by coronal holes and CMEs which have been enhanced by occasional, significant and sometimes prolonged episodes of southerly Bz, a common feature of alignments near the equinoxes.
The cells looked somewhat like a cell pattern that occurs on the sun's surface - similar to the bubbles that rise to the top of boiling water - but it was a surprise to find this pattern higher up in the corona, which is normally dominated by bright loops and dark coronal holes.
The tornadoes lie at the sun's poles--the same regions where darker, cooler parts of the atmosphere, known as coronal holes, are concentrated.
This was caused by southerly Bz vectors, sometimes assisted by coronal holes, which allowed the solar wind stream access to the inner magnetosphere.