I have been classifying galaxies at the galaxy zoo site, reachable at https://www.zooniverse.org/ This is a citizen science site, and they need people to help. I have been exclusively at the galaxy zoo site, which you access by clicking on the "Space" link. There are about one million images, via the SDSS project. This is a chance in a lifetime, a first in history (although it has been around for a few years), to be allowed to critically examine color images of galaxies, near and far, and to help astronomers by doing your best to classify the galaxies. You can save the images to 'collections' you make for yourself, and you can easily access some nice imaging software and data on the galaxies. If you like galaxies, this is the place to be. I can't think of a better way to learn about galaxies, than to critically examine them, and you can do this from your home. I have classified over 3000, but some people have classified vastly more. Doing this is really fun, challenging, and addicting. You learn, while helping. I have been referring to a long paper, Galaxy Morphology, by Ronald J Buta, available at http://arxiv.org/pdf/1304.3529v1.pdf I keep a copy as a pdf on my desktop to pull up quickly, when I am in need of help. I think one of the more enjoyable aspects is possibly being the first person to examine, and comment on, many of these galaxies. And galaxies are just one of a great many astronomical projects you can help with, as you will see if you go the zooniverse link. https://www.zooniverse.org/ Make sure you register to get credit for you work.