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A square-shaped coronal hole has been imaged by NASA’s Solar Dynamics Observatory. Open magnetic field lines cause these holes to form and gives high-speed streams of plasma a chance to escape the Sun pull.
A coronal hole is an area where high-speed solar wind streams into space. It appears dark in extreme ultraviolet light as there is less material to emit in these wavelengths. Inside the coronal hole you can see bright loops where the hot plasma outlines little pieces of the solar magnetic field sticking above the surface. Because it is positioned so far south on the Sun, there is less chance that the solar wind stream will impact us here on Earth. Credit: Solar Dynamics Observatory/NASA.
Amazing pictures. Glad it’s not pointing at us!
That “square hole” isn’t a hole, but a portion of the sun that is so dense and HOT that it actually bends light. Making it appear to have a hole. We are actually seeing behind our Sun.