If you're following ADYK, you've just learned about spiral and elliptical galaxies, and the Hubble classification scheme for galaxies. Astronomers have so many pictures of galaxies from various telescopes, and need help classifying all of them. Don't worry, there's no need to memorize the Hubble tuning fork or even know anything about galaxies! If you can look at pictures and answer some simple questions then you're good to go!
GalaxyZoo.org is part of NASA's zooniverse project. Zooniverse is a website where the general public can help astronomers study real astronomical data from telescopes. Basically you chose from a variety of tasks, such as classifying galaxies, measuring moon craters, looking for supernova, searching for exoplanets, etc., go through a short training session, and now you are the astronomer! The general public has helped astronomers make many new discoveries, just by spending a little time on zooniverse. Check out GalaxyZoo today, maybe you will be the next one to make a big discovery!
