UW Today

Sloan Digital Sky Survey

January 8, 2016

Quiet quasar has apparently eaten its fill

quasar and spectrum

Astronomers with the Sloan Digital Sky Survey (SDSS) announced that a distant quasar ran out of gas. Their conclusions, reported Jan. 8 at the American Astronomical Society meeting in Kissimmee, Florida, clarify why quasar SDSS J1011+5442 changed so dramatically in the handful of years between observations.

June 23, 2015

Visualizing the cosmos: UW astronomer Andrew Connolly and the promise of big data

UW astronomy professor Andrew Connolly at TED2014 at the Vancouver, B.C., convention center.

A conversation with UW astronomer Andrew Connolly on the coming Large Synoptic Survey Telescope and the promise of big data to the study of the universe.

July 18, 2014

Sloan Digital Sky Survey — including UW — now to view entire sky


The Sloan Digital Sky Survey, a consortium of institutions of which the University of Washington is part, will soon expand its view to see the entire sky, and even peer into the Milky Way’s galactic center.

January 8, 2014

Astronomers measure far-off galaxies to 1 percent precision

An artist's concept of the latest, highly accurate measurement of the universe from the Baryon Oscillation Spectroscopic Survey. The spheres show the current size of the "baryon acoustic oscillations" from the early universe, which now can be used as a "standard ruler" (white line) to measure the distances to all the galaxies in the universe.

University of Washington astronomers and colleagues have measured the distance to galaxies six billion light-years away — about halfway back to the Big Bang — to an accuracy of just 1 percent.