Hyunseop Choi

Cosmic black holes at the centers of galaxies are like giant banyan trees: their aerial root‑filaments stretch for kiloparsecs to harvest nourishing matter. For decades astronomers have debated: how does cooling gas from cluster atmospheres fall into the sphere of influence of a supermassive hole?

At the heart of massive galaxies, monstrous gravitational 'cocoons' brew — black holes with billions of solar masses, shrouded in a dense veil of gas and dust. But any metamorphosis requires breaking the shell.