“gravitational lens” effect tagged posts

Mauro Sereno et al. Gravitational lensing detection of an extremely dense environment around a galaxy cluster, Nature Astronomy (2018). DOI: 10.1038/s41550-018-0508-y

A study published recently in the journal Nature Astronomy and which questions current models of structure formation in the universe is based on data obtained with the Gran Telescopio Canarias and among its authors is a team of researchers from the Instituto de Astrofísica de Canarias (IAC). The structure of the universe can be compared to that of a sponge, often referred to as the cosmic web. Matter is concentrated along filaments which cross over each other, forming zones where most matter accumulates, and others where there is very little. At the densest points, galaxies group together, forming clusters...