re: this is mind blowing

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How can they make this map? I dont think we have seen this far?
How do they know we aren't the only supercluster?

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So how did they figure out this structure existed — and how did they distinguish it from other structures?

The team of scientists, led by R. Brent Tully of the University of Hawaii, first studied the motion of some 8,000 galaxies in our neighborhood. By doing so, they could map out certain striking patterns. The universe overall has been expanding ever since the Big Bang. But the team also found that gravity was pulling some galaxies toward each other

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In a fascinating new study for Nature, a team of scientists mapped thousands of other galaxies in our immediate vicinity, and discovered that the Milky Way is part of a truly massive "supercluster" of galaxies that they named Laniakea

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