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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.
In solar physics, a coronal loop is a well-defined arch-like structure in the Sun's atmosphere made up of relatively dense plasma confined and isolated from the surrounding medium by magnetic flux tubes. Coronal loops begin and end at two footpoints on the photosphere and project into the transition region and lower corona.
A video of the series of coronal mass ejections in August 2010. A coronal mass ejection (CME) is a massive burst of solar wind and magnetic fields rising above the solar corona. [15] Near solar maxima, the Sun produces about three CMEs every day, whereas solar minima feature about one every five days. [16]
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 loops are the basic structures of the magnetic solar corona. These loops are the closed-magnetic flux cousins of the open-magnetic flux that can be found in coronal holes and the solar wind. Loops of magnetic flux well up from the solar body and fill with hot solar plasma. [12]
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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]
Astronomers on Wednesday announced that they have detected a strong and organized magnetic field twisted in a spiral pattern around the Milky Way's supermassive black hole, revealing previously ...