Interest of the day

Coronal hole

morreale Tuesday 13 of January, 2015
The Cosmos website has posted an interesting article on the coronal hole that developed on the south pole of the Sun recently. The Sun has an magnetic field that flips every 11 years. The exact details of how the coronal hole develops is not well understood, but the north pole has flipped and the south pole magnetic field flip is still catching up. This could be part of the process that causes the coronal hole.