Hyperion proto-supercluster

The discovery was announced in late 2018. The discovery team, led by Olga Cucciati, used computational astrophysics methods and astroinformatics; statistical techniques were applied to large datasets of galaxy redshifts, using a two-dimensional Voronoi tessellation to correlate gravitational interaction (virialization) of visible structures. The existence of non-visible (dark matter) structures was inferred. Correlation was based on redshift data captured in a sky survey called VIMOS-VLT Deep Survey, using the Visible Multi Object Spectrograph (VIMOS) instrument of the Very Large Telescope in Chile, and other surveys to a lesser extent. Spectroscopic redshift data for 3,822 objects (galaxies) was selected. The discovery was published in Astronomy & Astrophysics in September 2018. ==Physical description==

The structure is estimated to weigh 4.8 × 1015 solar masses (about 5,000 times the mass of the Milky Way{{citation|title=This 'supercluster' of galaxies lets us peek into the universe's past ==Use in cosmology==

The supercluster contains dark matter, evidenced by a mismatch between the visible objects in it and their computed gravitational binding. As a relic from the early Universe, the dark matter data could be used to test cosmological theories. As the 2018 paper authors note, "the identification of massive/complex proto-clusters at high redshift could be useful to give constraints on dark matter simulations" of the Lambda-CDM model. ==See also==