Physicists from the AEgIS (Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy) Collaboration at CERN have found a new way of making long-lived positronium atoms, which consist of an electron and a positron (antimatter counterpart of the electron), for antimatter gravity experiments. Positronium is a hydrogen-like atom consisting of a positron and an electron revolving around each other. Image credit: Pete Linforth. The Universe is almost...
