The universe as a network of rivers:
This remarkable new map reveals how galaxies flow like water, following the pull of gravity across hundreds of millions of light years. https://t.co/krsqjnnoa3 pic.twitter.com/192Q28SrM9

— Corey S. Powell (@coreyspowell) April 26, 2024

Astrobites reports:

Cosmography is the science of cartography, but applied to the Universe by mapping out the Large Scale Structures such as voids, filaments and superclusters. While galaxy surveys are able to create such maps from just looking at spatial information from galaxy surveys, useful information for such a task is also available in the peculiar motions of galaxies. These are specifically, the motions of galaxies that arise due to their local gravitational interactions with nearby matter. This information allows us to explore how matter is moving in and out of regions of space, hence allowing for dynamical cosmography. [Continue reading…]