Sloan Digital Sky Survey
Multi-spectral imaging and spectroscopic redshift survey
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| 2021 | Las Campanas Observatory in Chile planned to follow Apache Point Observatory's technological upgrade with similar robotic data collection methods. |
| June 2021 | Apache Point Observatory scheduled to be converted from manually-placed plug plates to small automated robot arms for more efficient astronomical data collection. |
| 2020 | Concluded SDSS IV, completing a six-year survey period that included precision cosmological measurements, infrared spectroscopic surveys of the Galaxy in northern and southern hemispheres, and the first spatially resolved maps of individual galaxies using Sloan spectrographs. |
| October 2020 | Apache Point Observatory in New Mexico began gathering data for SDSS-V, initiating the next phase of the Sloan Digital Sky Survey with new survey components including Milky Way Mapper, Black Hole Mapper, and Local Volume Mapper. |
| July 2020 | After a 20-year survey, astrophysicists published the largest and most detailed 3D map of the universe, filling an 11-billion-year gap in its expansion history and providing data supporting the theory of a flat universe geometry. |
| 2014 | Launched SDSS IV, the fourth generation of the Sloan Digital Sky Survey, which expanded the project's scope to include multiple scientific initiatives including eBOSS (extended Baryon Oscillation Spectroscopic Survey), APOGEE-2 (Apache Point Observatory Galactic Evolution Experiment), and MaNGA (Mapping Nearby Galaxies at APO). |
| 2014 | MARVELS project concluded after analyzing 11,000 stars with 25-35 observations per star over 18 months, aiming to detect 150-200 new exoplanets and study rare planetary systems. |
| 2014 | BOSS completes its survey in Spring, successfully measuring the scale of the universe to an accuracy of one percent. The survey mapped the characteristic scale imprinted by baryon acoustic oscillations in the early universe. |
| 2014 | Conclusion of APOGEE data collection phase within SDSS III, having completed spectroscopic observations of red giant stars and collected elemental abundance information |
| 2014 | A large catalogue was released containing 10,258 variable and transient sources, of which 4,607 are confirmed or likely supernovae, making it the largest set of supernovae compiled at that time. |
| November 2013 | First data from APOGEE released as part of SDSS Data Release 10 (DR10), providing high-resolution infrared spectra of stars that penetrate dust-obscured regions of the galaxy |
| July 2013 | The tenth major data release (DR10) was published, providing comprehensive astronomical data including images, imaging catalogs, spectra, and redshifts through various search interfaces. |
| July 31 2013 | Data release 10 (DR10) was released to the public, including all previous data, the first results from the APO Galactic Evolution Experiment (APOGEE) with over 57,000 high-resolution infrared spectra of Milky Way stars, and over 670,000 new BOSS spectra of distant galaxies and quasars. |
| August 8 2012 | The Sloan Digital Sky Survey published a new 3D map of massive galaxies and distant black holes based on Data Release 9, providing a comprehensive astronomical survey visualization. |
| July 31 2012 | Data release 9 (DR9) was made public, featuring the first results from the Baryon Oscillation Spectroscopic Survey (BOSS), including over 800,000 new spectra, with over 500,000 spectra of objects from 7 billion years ago. |
| 2011 | APOGEE begins data collection, aiming to survey 100,000 red giant stars across the Milky Way galaxy |
| January 2011 | Data release 8 (DR8) was released, including all photometric observations taken with the SDSS imaging camera, covering 14,555 square degrees of the sky (approximately 35% of the full sky). |
This contents of the box above is based on material from the Wikipedia article Sloan Digital Sky Survey, which is released under the Creative Commons Attribution-ShareAlike 4.0 International License.