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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.
A coronal hole looks like a vast area of blackness in the Sun because coronal holes consist of cooler, less dense plasma. This plasma is able to travel at faster speeds into space, streaming along ...
On July 11, NASA's Solar Dynamics Observatory captured a big hole on the surface of the sun.. Tom Yulsman who writes for Discover's ImaGeo blog notes that there is no reason for people to be ...
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 ...
Photic retinopathy is damage to the eye's retina, particularly the macula, from prolonged exposure to solar radiation or other bright light, e.g., lasers or arc welders.The term includes solar, laser, and welder's retinopathy and is synonymous with retinal phototoxicity. [1]
A photo recently released by NASA?s Solar Dynamics Observatory shows the sun with a bright glow except for a dark hole-like patch.
Some prominences are ejected from the Sun in what is known as a prominence eruption. These eruptions can have speeds ranging from 600 km/s to more than 1000 km/s. [1] At least 70% of prominence eruptions are associated with an ejection of coronal material into the solar wind known as a coronal mass ejection. [18]
On 8 May 2024, a solar active region which had been assigned the NOAA region number 13664 (AR3664) produced an X1.0-class and multiple M-class solar flares and launched several coronal mass ejections (CMEs) toward Earth. [6] On 9 May, the active region produced an X2.25- and X1.12-class flare each associated with a full-halo CME.