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Galaxy Zoo 1 : Data Release of Morphological Classifications for nearly 900,000 galaxies

Lintott, Chris; Schawinski, Kevin; Bamford, Steven; Slosar, Anze; Land, Kate; Thomas, Daniel; Edmondson, Edd; Masters, Karen; Nichol, Robert; Raddick, Jordan; Szalay, Alex; Andreescu, Dan; Murray, Phil; Vandenberg, Jan

Galaxy Zoo 1 : Data Release of Morphological Classifications for nearly 900,000 galaxies Thumbnail


Chris Lintott

Kevin Schawinski

Anze Slosar

Kate Land

Daniel Thomas

Edd Edmondson

Karen Masters

Robert Nichol

Jordan Raddick

Alex Szalay

Dan Andreescu

Phil Murray

Jan Vandenberg


Morphology is a powerful indicator of a galaxy's dynamical and merger history. It is strongly correlated with many physical parameters, including mass, star formation history and the distribution of mass. The Galaxy Zoo project collected simple morphological classifications of nearly 900,000 galaxies drawn from the Sloan Digital Sky Survey, contributed by hundreds of thousands of volunteers. This large number of classifications allows us to exclude classifier error, and measure the influence of subtle biases inherent in morphological classification. This paper presents the data collected by the project, alongside measures of classification accuracy and bias. The data are now publicly available and full catalogues can be downloaded in electronic format from

Journal Article Type Article
Acceptance Date Jul 27, 2010
Online Publication Date Dec 14, 2010
Publication Date 2011-01
Deposit Date Jan 16, 2020
Publicly Available Date Mar 29, 2020
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 410
Issue 1
Pages 166–178
Keywords Astrophysics of Galaxies; Cosmology and Nongalactic Astrophysics
Public URL
Publisher URL
Additional Information This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2010 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.


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