India, Feb. 5 -- Astronomers have discovered that the black hole has "woken up" after remaining silent for nearly 100 million years.

Sabyasachi Pal, associate professor and head of department of pure and applied sciences at Midnapore City College in West Bengal and doctorate student Shobha Kumari, along with scientists in India and Poland have found the activity in radio galaxy J1007+3540 located more than three million light-years across, making it about 50 times larger than the Milky Way.

The find was made using powerful radio telescopes, including India's upgraded Giant Metrewave Radio Telescope (uGMRT) located at Khodad in Pune district. The study was published in the journal Monthly Notices of the Royal Astronomical Society.

Accor...