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.

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Source: NSF Multimedia Gallery - August 2, 2021 Category: Science Source Type: video