Photometric Galaxy Redshift Prediction

Sloan Digital Sky Survey (SDSS) Galaxy Redshift Dataset This dataset comprises a curated collection of galaxy observations from the Sloan Digital Sky Survey (SDSS). It features photometric and spectroscopic data for 100 galaxies, specifically selected to cover a range of redshifts from 0 to 0.4. The dataset includes the following key parameters for each galaxy: Photometric Data: Magnitudes in the SDSS 'u', 'g', 'r', 'i', and 'z' bands. Spectroscopic Data: Measured redshift (redshift) and its error (redshift_error). Additional Metadata: objid: Unique identifier for the photometric object. specObjID: Unique identifier for the spectroscopic object. ra: Right ascension in decimal degrees. dec: Declination in decimal degrees. class: Classification of the object, all marked as 'GALAXY'. Purpose and Use This dataset is intended for use in astronomical research and education, particularly in studies involving galaxy properties and distribution, cosmology, and machine learning applications such as redshift prediction models. The data is well-suited for developing and testing predictive models that estimate redshifts from photometric data, aiding in the expansion of accessible astronomical analysis tools. Data Collection Method The data was extracted using SQL queries against the public SDSS DR16 database, ensuring accuracy and relevance in current astronomical research contexts. Accessibility The dataset is made available under a CC0 license to promote open scientific research and collaboration within the astronomical community and beyond.

斯隆数字巡天（Sloan Digital Sky Survey，SDSS）星系红移数据集

本数据集精选自斯隆数字巡天（SDSS）的公开星系观测数据，涵盖100个星系的测光与光谱观测资料，经筛选覆盖0至0.4的红移范围。

每个星系包含以下核心参数：
- 测光数据：斯隆巡天u、g、r、i、z波段的星等
- 光谱数据：实测红移（redshift）及其误差（redshift_error）
- 附加元数据：
- objid：测光天体的唯一标识符
- specObjID：光谱天体的唯一标识符
- ra：以十进制度表示的赤经
- dec：以十进制度表示的赤纬
- class：天体分类，所有样本均标记为「GALAXY（星系）」

用途与适用场景
本数据集旨在服务于天文研究与教学工作，尤其适用于星系属性与分布、宇宙学相关研究，以及红移预测模型等机器学习应用场景。该数据集非常适合用于开发和测试基于测光数据估算红移的预测模型，助力拓展可及的天文分析工具。

数据采集方法
本数据集通过SQL查询从公开的SDSS DR16数据库中提取，确保了当前天文研究语境下的数据准确性与研究相关性。

可及性说明
本数据集采用CC0协议发布，以推动天文及跨领域科研社区的开放科学研究与协作。