Earlier this year, an international team of astronomers that included two South Africans managed to explore behind thick clouds of dust particles in the Milky Way that had previously made it impossible to map large parts of the sky. Now, continuing the quest to discover massive areas of the universe that have previously been a mystery, a colossal supercluster of previously hidden galaxies has been revealed. It covers more sky than the biggest supercluster previously known to man, with a gravitational pull that could have a massive cosmological impact on the galaxies around it – including ours. Understanding it could unveil some puzzling secrets of where we are going, and why. By MARELISE VAN DER MERWE.