Wikipedia

2. There’s a Monster Black Hole At the Center Of Our Galaxy

The black hole at the center of our galaxy is quite impressive, with an estimated mass that is billions of times more massive than that of our sun. It may have started considerably smaller, but our galaxy has an abundant supply of gas and dust that has let the black hole grow to an impressive size.

While black holes can’t currently be observed directly, astronomers can detect their presence and estimate their size based on the gravitational effects that can be viewed around them. It is currently believed that most galaxies have a black hole at their center.

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