Laniakea Strands

Laniakea — the ~500 Mpc supercluster basin of attraction that encompasses the Milky Way — is threaded by filamentary strands of galaxies connecting sub-clusters and groups into a coherent web-like network. The detailed topology of these strands, their thickness, galaxy content, and the velocity field around them show features that stretch standard ΛCDM's predictive precision. In particular, the velocity field reconstruction that defined Laniakea identified infall patterns organized around a small number of dominant attractor nodes connected by these strands — a more organized, network-like topology than the stochastic filamentary web produced in ΛCDM simulations of equivalent volume. Successive Collision Theory identifies Laniakea's strand network as tracing the intersection geometry of the collision event: strands mark the lines where collision-front sweeping concentrated matter from two approaching directions simultaneously — the cosmic equivalent of the seam where two curved swept surfaces meet.

The angular momentum inherited along each strand provides structural support against radial collapse and maintains the strand's filamentary character over cosmic time. Matter flowing along strands is on angular-momentum-supported orbits inherited from the collision, which keeps it preferentially in the filament rather than collapsing into the nodes. This produces the characteristic thin, highly elongated strand morphology rather than the broader, more diffuse filaments that pure gravitational collapse from Gaussian initial conditions tends to generate. The connectivity of Laniakea — the specific number and orientation of dominant strands feeding the Great Attractor node — encodes the number and geometry of collision-front intersection lines, making it a direct map of the local collision geometry that SCT predicts should be identifiable with sufficiently detailed peculiar velocity surveys.