In this podcast, 3C 279 is active. “3C” refers to the “3rd Cambridge Catalogue of Radio Source”, and “279” is this object’s number in that catalog, which was published way back in 1959, when radio astronomical observations were just a toddler. And though we’ve known about this object for decades, it has been observed to … Continue reading OTN Ep #006: 3C 279 is active →