GalaxyZoo is asking for your help to sort galaxies that no one has ever seen before - and here's why they're not using just computers to do the job:
Why do we need you?
The simple answer is that the human brain is much better at recognising patterns than a computer can ever be. Any computer program we write to sort our galaxies into categories would do a reasonable job, but it would also inevitably throw out the unusual, the weird and the wonderful. To rescue these interesting systems which have a story to tell, we need you.