South Africa’s MeerKAT telescope is mapping previously invisible spaces between galaxies – and it’s found 60 new cosmic structures

Diffuse radio emissions captured by the MeerKAT telescope spanning millions of light-years. Visualisation by Konstantinos Kolokythas, CC BY

Astronomers are uncovering previously hidden structures within some of the universe’s largest objects, known as galaxy clusters. Using the powerful MeerKAT radio telescope in South Africa, researchers have mapped faint, diffuse radio emissions, an imprint that reveals energy processes taking place in the vast spaces between galaxies when galaxy clusters collide or merge.

Konstantinos Kolokythas, a radio astronomer and postdoctoral research fellow at Rhodes University and the South African Radio Astronomy Observatory (SARAO), has led research into what these radio emissions reveal about our cosmic history. His findings provide a glimpse of what powerful instruments like MeerKAT and the upcoming Square Kilometre Array (SKA) will discover as they explore the “invisible” radio universe.