Galaxy Zoo: Citizen science on Rails

Galaxy Zoo Citizen Science on Rails Arfon Smith

Citizen science?

700,000 Images

20,000 Users

40,000,000 Inspections

Awesome

Astronomy?

100 80 60 40 20 0 Professor

10,000 7,500 5,000 2,500 0 Professor Paper

50,000 37,500 25,000 12,500 0 Professor Paper PhD

1,000,000 750,000 500,000 250,000 0 Professor Paper PhD SDSS

70,000 60,000 Classifications per hour 1 50,000 Kevin weeks 40,000 30,000 20,000 Fukugita et al. 2007 10,000 0 0 6 12 18 24 30 36 42 48 Hours

1,000,000 Galaxies

170,000 Users

70,000,000 Classifications

70,000,000 Does it work? Classifications

You bet

Clean Super Clean

better than the professionals

1. Collaborators not users 2. Contribute to real research 3. Don’t waste people’s time

Land K., et al., 2008, Galaxy Zoo: The large-scale spin statistics of spiral galaxies in the Sloan Digital Sky Survey Lintott C.J., et al., 2008, Galaxy Zoo: Morphologies derived from visual inspection of galaxies from the Sloan Digital Sky Survey Bamford S.P., et al., 2008, Galaxy Zoo: the dependence of morphology and colour on environment Slosar A., et al., 2008, Galaxy Zoo: Chiral correlation function of galaxy spins Schawinski K. et al. 2009, Galaxy Zoo : A sample of blue early-type galaxies at low redshift

250,000 Galaxies

225,000 Users

28,000,000 Classifications

70,000,000 What ’s next? Classifications

Contribution to research

Galaxy Zoo Database

Galaxy Zoo Crow Zoo Moon Zoo Papyrus Zoo Database Database Database Database

Task Project Annotation User Asset Answer

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9

HAProxy Web Web Web HAProxy API API MySQL Master MySQL Slave MySQL Slave

Questions?

Galaxy Zoo: Citizen science on Rails

by Arfon Smith on May 06, 2009

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