NASA Observes a Massive Solar Coronal Hole

On May 26, 2016 NASA, via theĀ Solar Dynamics Observatory (SDO), announced the observance of a massive coronal hole at the suns surface, visible between May 17-19.

Coronal holes are areas where the Sun’s corona is darker, and colder, and has lower-density plasma than average because there is lower energy and gas levels.

SDO captures a coronal hole showing up as the dark region near the top of the sun. The hole appears dark because it contains much less solar material and is therefore cooler than the surrounding area.


A gigantic hole in the sun’s atmosphere has opened up and a broad stream of solar wind is flowing out of it. Inside the coronal hole, solar wind plasma is free to fly away.

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