Galaxy Zoo 1

The original Galaxy Zoo project ran from July 2007 until February 2009, before being replaced by Galaxy Zoo 2 and then, in turn by Galaxy Zoo: Hubble. Volunteers were asked to classify SDSS galaxies as belonging to one of six categories - elliptical, clockwise spiral, anticlockwise spiral, edge-on galaxies, 'star/don't know' or merger. These files contain the resulting classifications of nearly 900,000 galaxies drawn from the Sloan Digital Sky Survey. These files here are Zipped CSV files, gzip, FITS and VO formats available at http://data.galaxyzoo.org/ The project is described in Lintott et al., 2008, MNRAS, 389, 1179 (linked below) and the data release is described in Lintott et al. 2010. Anyone making use of the data should cite at least one of these papers in any resulting publications. FILES: Table 2 gives classifications of galaxies which have spectra included in SDSS Data Release 7. The fraction of the vote in each of the six categories is given, along with debiased votes in elliptical and spiral categories and flags identifying systems as classified as spiral, elliptical or uncertain. Table 3 gives classifications of galaxies included in the Galaxy Zoo sample which did not have spectra available in SDSS Data Release 7. It is not possible to estimate the bias in the sample, and so only the fraction of the vote in each of the six categories is given. Table 4 gives a series of measures of classification confidence. Tables 5 and 6 give the results from the bias study that introduced mirrored (table 5) and monochrome (table 6) images. Table 7 gives the fraction of votes in each of the six categories, combining results from the main and bias studies.

原始Galaxy Zoo（星系动物园）项目于2007年7月至2009年2月运行，后续由Galaxy Zoo 2接替，随后又被Galaxy Zoo: Hubble取代。志愿者需对斯隆数字巡天（Sloan Digital Sky Survey, SDSS）的星系进行分类，共分为六大类别：椭圆星系、顺时针旋臂旋涡星系、逆时针旋臂旋涡星系、侧视星系、“恒星/无法识别”以及并合星系。
本数据集包含来自斯隆数字巡天的近90万个星系的分类结果。本次提供的文件包含gzip压缩的CSV文件、FITS格式与VO格式文件，可通过http://data.galaxyzoo.org/ 获取。
该项目的详细介绍见于Lintott等人2008年发表于《皇家天文学会月刊（MNRAS）》第389卷第1179页的论文（下文附链接），本次数据发布的说明则出自Lintott等人2010年的研究。使用本数据集的研究者需在最终产出的学术成果中至少引用上述两篇论文之一。

表2收录了拥有斯隆数字巡天第7次数据发布（SDSS Data Release 7, DR7）光谱的星系分类结果，给出了六大类别各自的投票占比，同时提供椭圆星系与旋涡星系类别的去偏投票结果，以及用于标记系统是否被归类为旋涡星系、椭圆星系或不确定类别的标签。
表3收录了Galaxy Zoo样本中未在斯隆数字巡天第7次数据发布中获取光谱的星系分类结果，由于无法估算该样本的偏差，仅给出六大类别各自的投票占比。
表4提供了一系列分类置信度的衡量指标。
表5与表6给出了偏置研究的结果：其中表5对应镜像图像实验，表6对应单色图像实验。
表7整合了主项目与偏置研究的结果，给出了六大类别各自的投票占比。