The Sun

http://www.nrl.navy.mil/content_images/sun.jpg

This picture is fascinating because it shows in great detail a large solar prominence extending from the surface adding almost half of its diameter to it. 

http://naturalorder.info/now/images/sunspots.gif

This picture illustrates the number of sunspots there are on out sun.  Every lighter part of the sun is part of a sunspot or the light given off by a sunspot which is significantly less than the surrounding areas.

http://wps.prenhall.com/wps/media/objects/679/695937/sunflip.gif

This picture shows a graph for the predictions, although outdated, of sunspot activity and formation.

http://thegalaxyguide.com/galaxy/sun/ultra_violet_sun.gif

This is the Sun seen through the ultraviolet wavelength.

http://hea-www.harvard.edu/CHAMP/EDUCATION/PUBLIC/ICONS/sun_infrared.gif

This is the Sun seen through the infrared wavelength.  As you can see, sun spots are easily spotted when viewing the sun through this wavelength.

http://www.solarviews.com/raw/sun/xsun.gif

This is the sun seen through the x ray wavelength.

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqHegaPYDq8wWnUnzd64KKa2rdv-OnFmRJNETA7bEQRVeB5im3aUUGz8asttgAv_dtgEAUyJX9N4QRkNBWmjrXgZVenyFx1IXhE4qXE4RvhOja4By9UaI9u2IpU0tPwy-thjFanVKeJhyphenhyphenI/s400/Arcturus+Pollux+Sirius+Sun+Jupiter+Earth.jpg

This picture is interesting because it puts our sun into size comparison with other large stars.  It is infinitesimally smaller than Arcturus.  It also mentions that in this scale Earth is not visible it is so small.