Guardian: Since 2008, the 2.5-meter telescope at Apache Point Observatory in New Mexico has been collecting data for the Sloan Digital Sky Survey’s third and final map of the night sky. Yesterday at the annual meeting of the American Astronomical Society in Seattle, Washington, the survey’s researchers released the map to astronomers and to the public. As the Guardian‘s Alok Jha reports, SDSS-III constitutes the most detailed map of a large swath of the night sky ever assembled. Each of the map’s pixels contains data taken in five different wavelength bands.