300 Years Ago the Black Hole at the Milky Way's Core Reawakened

Milky_way_core Astronomers have long wondered why it was that the super-massive black hole in the center of our galaxy was relatively quiet. Known as Sagittarius A*, a massive hole, containing about 4 million times the mass of our Sun. Yet, despite its size, the energy radiated from its surroundings is billions of times weaker than black holes at the core of other galaxies.

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