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Recent observations using several different telescopes and sky surveys showedpatterns of asymmetry in the distribution of galaxies by their spin directionsas observed from Earth. These studies were done with data imaged from theNorthern hemisphere, showing excellent agreement between different telescopesand different analysis methods. Here, data from the DESI Legacy Survey wasused. The initial dataset contains $\sim2.2\cdot10^7$ galaxy images, reduced to$\sim8.1\cdot10^5$ galaxies annotated by their spin direction using a symmetricalgorithm. That makes it not just the first analysis of its kind in which themajority of the galaxies are in the Southern hemisphere, but also by far thelargest dataset used for this purpose to date. The results show strongagreement between opposite parts of the sky, such that the asymmetry in onepart of the sky is similar to the inverse asymmetry in the corresponding partof the sky in the opposite hemisphere. Fitting the distribution of galaxy spindirections to cosine dependence shows a dipole axis with probability of4.66$\sigma$. Interestingly, the location of the most likely axis is withinclose proximity to the CMB Cold Spot. The profile of the distribution is nearlyidentical to the asymmetry profile of the distribution identified inPan-STARRS, and it is within 1$\sigma$ difference from the distribution profilein SDSS and HST. All four telescopes show similar large-scale profile ofasymmetry.

Large-scale asymmetry in galaxy spin directions: evidence from the Southern hemisphere