这项研究是斯隆数字巡天项目(SDSS)的一部分。
The research was conducted as a part of Sloan Digital Sky Survey (SDSS).
Farihi及其团队观察了斯隆数字巡天项目探测到的带有特定钙污染光谱标志的146颗白矮星。
Farihi and his team looked at 146 white dwarfs detected by the Sloan Digital Sky Survey that show the spectral signature of calcium pollution.
该图来自斯隆数字巡天计划，可以看出那些小行星（画绿圈圈的）在移动，而右下方的NGC4517A星系就很呆。
In images from the Sloan Digital Sky Survey, asteroids (circled in green) appear to move over time. Galaxies like NGC4517A, at lower right, don't.
研究人员从斯隆数字巡天计划中搜集了 8000 个星系团的数据，他们通过平均这些数据处理了这个问题。
The researchers approached the problem by averaging data collected from 8000 galaxy clusters by the Sloan Digital Sky Survey.
GalaxyZoo项目寻求大众的参与，协助斯隆数字巡天系统记录下的大量星系，以及更多最新的深度哈勃影像进行分类。
Galaxy Zoo enlists the public to help classify galaxies found in the Sloan Digital Sky Survey, and more recently in deep Hubble imagery.
自从斯隆数字巡天于2000年开始工作，头几个星期它在新墨西哥州的望远镜收集到的数据量就超过了整个天文学历史的积累数据量。
WHEN the Sloan Digital Sky Survey started work in 2000, its telescope in New Mexico collected more data in its first few weeks than had been amassed in the entire history of astronomy.
同时，在新墨西哥州从事斯隆数字巡天望远镜的天文学家们，从2000年以来已经绘制了大约25%的天空，获得了超过2亿个目标的数据。
Meanwhile, astronomers working with the Sloan Digital sky Survey telescope in New Mexico have mapped some 25% of the sky since 2000, obtaining data on more than 200 million objects.
同时，在新墨西哥州从事斯隆数字巡天望远镜的天文学家们，从2000年以来已经绘制了大约25%的天空，获得了超过2亿个目标的数据。
Meanwhile, astronomers working with the Sloan Digital sky Survey telescope in New Mexico have mapped some 25% of the sky since 2000, obtaining data on more than 200 million objects.
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