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A coronal hole at the Sun's north pole observed in soft X-ray. Coronal hole size and population correspond with the solar cycle. As the Sun heads toward solar maximum, the coronal holes move closer and closer to the Sun's poles. [4] During solar maxima, the number of coronal holes decreases until the magnetic fields on the Sun reverse.
Coronal mass ejections are usually visible in white-light coronagraphs. A coronal mass ejection ( CME ) is a significant ejection of plasma mass from the Sun's corona into the heliosphere . CMEs are often associated with solar flares and other forms of solar activity , but a broadly accepted theoretical understanding of these relationships has ...
A coronal hole high-speed stream produces increased solar winds that leave the Sun radially. "When a CH rotates to the center of the Sun (directly facing Earth), the elevated speed starts its ...
Solar storms are caused by disturbances on the Sun, most often coronal clouds associated with solar flare CMEs emanating from active sunspot regions, or less often from coronal holes. The Sun can produce intense geomagnetic and proton storms capable of causing power outages, disruption or communications blackouts (including GPS systems) and ...
He explains that the massive dark area in our star's swirly, golden corona is simply, "a place where the Sun's magnetic field opens out into interplanetary space, allowing hot material from the ...
A photo recently released by NASA?s Solar Dynamics Observatory shows the sun with a bright glow except for a dark hole-like patch.
CIRs develop when high-speed solar wind, typically originating from coronal holes, catches up to slower wind streams. The resulting compression creates distinct boundaries: a forward pressure wave at the leading edge and a reverse pressure wave at the trailing edge. At greater distances from the Sun, these pressure waves can develop into shock ...
A coronal mass ejection (CME) Solar storms of different types are caused by disturbances on the Sun, most often from coronal mass ejections (CMEs) and solar flares from active regions, or, less often, from coronal holes.