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August 2, 2021

Astronomers discover two pairs of quasars in distant universe

Astronomers have discovered two pairs of quasars in the distant universe, about 10 billion light-years from Earth. In each pair, the two quasars are separated by only about 10,000 light-years, making them closer together than any other double quasars found so far away.

[Research supported by U.S. National Science Foundation grants AST 2009947 and PHY 1430284.]

Learn more in the NoirLab news story Black hole pairs found in distant merging galaxies. (Date image taken: unknown; date originally posted to NSF Multimedia Gallery: Aug. 2, 2021)

Credit: International Gemini Observatory/NOIRLab/NSF/AURA/J. da Silva (Available under Creative Commons Attribution 4.0 International -- CC BY 4.0)

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