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Credit: SARAO Two giant radio galaxies have been discovered with South Africa’s powerful MeerKAT telescope. These galaxies are amongst the largest single objects in the Universe and are thought to be quite rare. The fact that MeerKAT detected two of these monsters in a relatively small patch of the sky suggests that giant radio galaxies may actually be much more common than previously thought. This gives astronomers further vital clues about how galaxies have changed and evolved throughout cosmic history. The discovery has been published today, Monday, 18 January 2021 in the Monthly Notices of the Royal Astronomical Society. Many galaxies have supermassive black holes residing in their midst. When large amounts of interstellar gas start to orbit and fall in towards the black hole, the black hole becomes ‘active’ and huge amounts of energy are released from this region of the galaxy.

South africaUnited statesUniversity of the western capeWestern capeUniversity of cape townMatthew prescottBrian heywoodJacinta delhaizeKarlg janskyMonthly notices of the royal astronomical societyUniversity of oxfordInternational gigahertz tiered extragalactic explorationAuthority on newsMonthly noticesRoyal astronomicalResearch fellow