India, Oct. 30 -- Scientists from Indian Institute of Science Education and Research (IISER) Pune and the National Centre for Radio Astrophysics-Tata Institute of Fundamental Research (NCRA-TIFR) have discovered the first known radio galaxy showing evidence of four separate episodes of activity from its central supermassive black hole, offering new insights into how these cosmic giants power enormous jets of energy.

The galaxy, named J023721.13-010528.5, stretches about 4.2 million light-years and has a distinctive S-shaped structure. The findings were published in "The Astrophysical Journal" on October 21.

The study was led by Pavan Khadekar, a PhD student at IISER Pune, under the guidance of professor Dharam Vir Lal of NCRA-TIFR and p...