Welcome to Galaxy Zoo!


Welcome to Galaxy Zoo, where you can help astronomers explore the Universe!

Galaxy Zoo: Hubble uses gorgeous imagery of hundreds of thousands of galaxies drawn from NASA's Hubble Space Telescope archive. To understand how these galaxies, and our own, formed we need your help to classify them according to their shapes — a task at which your brain is better than even the most advanced computer. If you're quick, you may even be the first person in history to see each of the galaxies you're asked to classify.

More than 250,000 people have taken part in Galaxy Zoo so far, producing a wealth of valuable data and sending telescopes on Earth and in space chasing after their discoveries. The images used in Galaxy Zoo: Hubble are more detailed and beautiful than ever, and will allow us to look deeper into the Universe than ever before. 


Thanks for your help, and happy classifying.

The Galaxy Zoo team.

How To Take Part

To begin exploring, click the 'How To Take Part'.

Your job is very simple! When classifying you will be shown an image of a galaxy and be asked a series of questions about it. All you need to do is to look for features that mark out different types of galaxy and answer the questions as well as you can. This is a job that humans are much better at than computers, so most of the questions should be fairly easy. If you find it hard to decide upon the answer to a particular question, don't worry! There often won't be a 'correct' answer. Just pick the one that seems best and move on to the next question. By looking at all the answers given for each galaxy the Galaxy Zoo scientists will be able to work out which is most likely to be the right one, and how sure we can be about it. Your individual opinion is extremely important to making that possible.

(for more information visit Galaxy Zoo: Huble Tutorial)

Galaxy examples

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