SPT-CLJ2106-5844 is the galaxy cluster located 7.5 billion light years from Earth. It was discovered by scientists from the South Pole Telescope Collaboration, using the South Pole Telescope. With a weight of about 1.27 × 1015 solar masses, it's the most massive distant object known. It is about 60% heavier than previously known object detected in 2008, SPT-CL J0546-5345.
- "Antarctica Telescope Finds Most Massive Distant Object -1000 Times Mass of Milky Way". The Daily Galaxy. 2011-04-12. Retrieved 2011-04-12.
- Foley, R. J.; Andersson, K.; Bazin, G.; de Haan, T.; et al. (20 April 2011). "DISCOVERY AND COSMOLOGICAL IMPLICATIONS OF SPT-CL J2106-5844, THE MOST MASSIVE KNOWN CLUSTER AT z>1". The Astrophysical Journal. 731 (2): 86. arXiv: . Bibcode:2011ApJ...731...86F. doi:10.1088/0004-637X/731/2/86. Retrieved 2011-04-13.
- Reichardt, Christian (2011-01-11). "SPT SZ Observations" (PDF). Planck conference. Retrieved 2011-04-16.
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