The international Galaxy Zoo 2 project is again turning to amateur astronomers and their PCs to study the many thousands of images of galaxies it has captured.
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Key questions for participants being fed images are: how many arms in that spiral galaxy? How elongated is this ellipse? Does the image appear to depict a merger of multiple galaxies?
The images are studied repeatedly by different participants to make sure the answers are as accurate as possible.
The first Galaxy Zoo project attracted an estimated 150,000 volunteers when it was launched in 2007.
The call for volunteers this time round on national news, led to the project's server temporarily going down earlier this week, such was the response.
One volunteer interviewed on the news said the project had led him to enrol on an Open University physics degree course.