Two decades’ worth of observations of supernova explosions and a powerful new analysis tool has provided the most accurate accounting of dark energy and dark matter to date.

Dark energy and dark matter — often collectively known as the “dark universe” — are mysterious because despite making up at least 95% of the universe’s energy and matter content, they can’t be observed directly. The existence of dark energy is inferred from the fact it drives the accelerating expansion of the universe. Dark matter, which does not interact with light and is thus “invisible” is indirectly detected due to its gravitational influence, which literally prevents galaxies from flying apart as they rotate.