Our Galaxy Appears To Be Part Of Structure So Large It Challenges Our Models Of Cosmology

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Scientists have discovered that our galaxy, the Milky Way, could be a small part of a larger cosmic community than previously believed. If this finding is verified through additional research and observations, it may indicate that our current understanding of the universe's development is incomplete.

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The structure, which is itself part of a giant basin called Laniakea. According to this new study, Laniakea itself is located within a larger "basin of attraction" (BoA) that's potentially tens of times its size.

The entire Universe can be thought of as a mosaic of adjacent BoA, much like the earth's ground is divided into watersheds," the team notes in their report. "A BoA usually isn't held together by gravity since the overall movement of far-off points within it is mostly influenced by the expansion of the cosmos.

The basins of attraction are incredibly large structures, dominated more so by their vastness than gravity, yet evidence of shared motion has still been found. The team examined the movements of 56,000 galaxies, creating a "probabilistic map" of the local universe to account for the inaccuracies associated with measuring the speed and movement of galaxies.

“Just like water flows through river basins on Earth, galaxies flow through cosmic basins of attraction. Discovering these bigger areas of gravitational pull could completely change our understanding of how galaxies are structured.”

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Very close by, there is evidence for a region centered around the highly hidden Ophiuchus cluster, which is located behind the middle of our Milky Way Galaxy," the team explained. "This region may include the so-called Great Attractor area and the entity Laniakea, which includes our own galaxy. Further out, the Sloan Great Wall and the structure associated with it are the dominant features.

Creating these maps of the universe is a complex task, tracing the movement of galaxies and their interactions to model these cosmic "currents" and flows. As a result, a lot of uncertainty is involved. The team's simulations suggest that there's a 60 percent likelihood our own Milky Way galaxy is possibly not part of Laniakea, but rather in the Shapley concentration.

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Currently, the observed galaxies appear to be larger than our current models predict. For the time being, the team intends to continue mapping the largest structures in the universe.

Finding out that there's a strong possibility we're part of a significantly larger structure is pretty exciting. That said, it's just a lead for now: we'll need more observations to confirm just how big our home supercluster is.

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