There’s a colossus at the heart of Milky Way, a black body with the mass of four million suns

How long has it been there? How does this supermassive black hole, Sagittarius A*, interacts with the galaxy? Are there traces of its past? What can it tell us about similar bodies at the centre of other big galaxies in the Universe?

The answers of IA researchers and collaborators take us on to the territories of gravity, high energy physics, galactic evolution, cosmology and big radio telescopes.

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