Galaxies are not arranged in a nice grid formation in the sky, nor are they random. Galaxies form part of very large-scale structures or clusters, and some of these clusters are pretty massive. At least two known superstructures lie in the zone of avoidance, where it's difficult to see as the Milky Way obscures the background galaxies. Professor Renee Kraan-Kortweg of the University of Cape Town talks about the Great Attractor and the Vela Supercluster, solving puzzles about how galaxies are moving in space.

Looking up - 18 January 2019

Five minutes at the end of each week explores the big and the small questions in astronomy, cosmology, and space science. Hosted by Kechil Kirkham, no subject is too big or too small, and experts are regularly brought on board to illuminate and excite. Cape Town is the place to be for astronomy, with some of the largest telescopes in the world housed or being built not too far away. Looking Up takes advantage of the shoals of scientists and engineers working on the planet’s most advanced astronomy projects, who live and work right here in the Mother City. Kechil has recently acquired an MPhil in Space Studies at the University of Cape Town, and works in South Africa’s space industry on the Square Kilometre Array radio telescope.