Galaxyzoo sound like too much effort… use the spare power in your PC and join BOINC.
This progam runs in the background – even just as the screen saver for a slow PC – and does complicated calculations for a variety of Science experiments.
Over 300000 people are active members – doing work on projects such as;
- Einstein@Home – searching for Gravitational Waves
- SETI@Home – looking for Extra-terrestrial radio signals
- Rosetta@Home – lookign for cures to diseases
- ClimatePrediction.net – modelling climate change scenarios
It costs nothing, takes none of your time – but with over 300000 computers working at a time you are acting as part of one giant SuperComputer!