Become a Sunspotter and play Solar ‘Hot-or-Not’

A few months ago we quietly placed a new project online. Called Sunspotter, it was essentially a game of hot-or-not for sunspot data – and since there were not many images available at the time, we thought it best to just let it be used by the people who noticed it, or who had tried it during the beta test. The results have since been validated, and the site works! In fact there are even preliminary results, which is all very exciting. Loads of new images have now been prepared, so today Sunspotter gets its proper debut. Try it at www.sunspotter.org.

We’re back!! 210,692 images of the finest sunspots for you to get stuck into: http://t.co/yxFAgIc46Y#LetsDoThis

— Sunspotter (@sunspotter_org) June 13, 2014

On the site you are shown two images of sunspot groups and asked which is more complex. That might sound odd at first, but really it’s quite easy. The…