Sunspotter is back!


Large sunspot group near the limb of the Sun. Image from, taken by the Michelson Doppler Imager on board SOHO


Some of you may remember back in February we launched a new project called Sunspotter. It was only a soft launch with a a small dataset that was classified very quickly by our volunteers. Well, it’s back! But this time there is plenty of data to go through; with over 200,000 images of sunspot groups that we need your help to classify. Get involved now at

WARNING: This project can be VERY addictive!