This is a picture of the sun, showing 1 million degree "plumes" which may be the source of the "solar wind". The solar wind is a continual streaming out of hot gases and dust from the sun.
This picture was taken with an ultraviolet filter. The radiation it shows is invisible to the naked eye.
PtyS 403 is the course that covers the solar wind most directly.
PtyS 106 covers the Sun.
PtyS 105 covers stars in general.
Some other places you can find information on the Sun and the solar wind include: