"We hypothesize that the advanced civilizations may live safely inside the supermassive black holes in the galactic nuclei being invisible from the outside."
Vyacheslav Dokuchaev --Moscow's Institute for Nuclear Research of the Russian Academy of Sciences
Astronomers report that they have discovered the most gigantic black holes ever found in the universe, an abyss 10 times the size of our solar system, encompassing regions or "event horizons" about five times the distance from the sun to Pluto or about 2,500 times as massive as the black hole at the center of the Milky Way.
The biggest of of these monsters, which weighs as much as 21 billion Suns, is in an egg-shaped galaxy known as NGC 4889, the brightest galaxy in the Coma cluster of thousands of galaxies about 335 million light-years away. The image at bottom of page shows the central region of the Coma cluster, with giant elliptical galaxies NGC 4889 and NGC 4874.
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