Astronomy’s next big thing: the Square Kilometre Array
When I started research in radio astronomy in 1947, the only known sources of cosmic radio waves were the Sun and the Milky Way. Observing techniques were simple: receivers were insensitive, there was no expectation that other radio sources could be located or even existed. A few years later, a whole vast radio sky was revealed, populated with supernova remnants, galaxies, and quasars.