斯隆数字化巡天（SDSS）DR13星表

斯隆数字巡天，英文“Sloan Digital Sky Survey”，简称SDSS。这里的斯隆指的是阿尔佛雷德斯隆（Alfred P. Sloan）基金会。斯隆基金会是这个巡天项目的主要资助机构。SDSS是一项宏伟的巡天计划。它将对四分之一的天区进行深度的普查观测，为一亿个以上的天体测定位置和亮度，为一百万颗以上的星系和类星体测定距离。相比之下，依巴谷星表仅包含不到12万个天体，第谷星表也不过一百万多一点儿。 SDSS将通过对大量星系、类星体、恒星等天体的观测，绘制出迄今最精确的宇宙结构图，研究星系在宇宙中的分布，测定宇宙的基本特性，寻找宇宙中最遥远的天体。SDSS力图深化人类对宇宙一些基本问题的认识。关于宇宙的起源和演化，科学家有各种各样的想法和理论。SDSS的观测将可能告诉我们哪些是正确的，哪些是不正确的，我们是否需要全新的宇宙理论。 本数据集主要是星表数据，记录数约12亿条。

The Sloan Digital Sky Survey (SDSS) takes its name from the Alfred P. Sloan Foundation, the primary sponsor of this astronomical survey program. SDSS is an ambitious large-scale sky survey. It will perform deep census observations over one-quarter of the celestial sphere, measuring positions and brightnesses for over 100 million celestial objects, and distances for more than one million galaxies and quasars. For comparison, the Hipparcos Catalogue contains fewer than 120,000 celestial objects, while the Tycho Catalogue includes just over one million entries. Through observations of a vast number of galaxies, quasars, stars and other celestial bodies, SDSS will produce the most accurate cosmic structure map to date, investigate the spatial distribution of galaxies across the universe, characterize the fundamental properties of the cosmos, and seek out the most distant celestial objects known. SDSS endeavors to advance human understanding of several fundamental questions regarding the universe. Concerning the origin and evolution of the universe, scientists have put forward a diverse array of hypotheses and theories. SDSS’s observational data may help determine which of these theories are valid, which are not, and whether entirely new cosmological theories are required. This dataset primarily comprises catalog data, with approximately 1.2 billion recorded entries.

搜集汇总

背景与挑战

背景概述

该数据集是斯隆数字化巡天（SDSS）第13次数据发布（DR13）的星表数据，包含约12亿条记录，覆盖全天四分之一天区，用于对一亿个以上天体进行位置和亮度测定，并为一百万颗以上星系和类星体提供距离测量。其特点是深度普查观测，涉及巡天、测光、天体光谱等多主题，旨在绘制精确宇宙结构图和研究宇宙演化，数据同步自美国SDSS项目，保证了完整性和质量一致性。