Sloan Digital Sky Survey (SDSS)

The 2.5-meter telescope is located at the Apache Point Observatory in New Mexico.

Light observed
Redshift survey
Observation periods
  • SDSS-1: 2000-2005
  • SDSS-2: 2005-2008
  • SDSS-3: 2008-2014
Four surveys
  • Apache Point Observatory Galactic Evolution Experiment (APOGEE)
  • Baryon Oscillation Spectroscopic Survey (BOSS)
  • Multi-Object APO Radial Velocity Exoplanet Large-area Survey (MARVELS)
  • Sloan Extension for Galactic Understanding and Exploration 2 (SEGUE-2)
SDSS's homepage