Author: Stephen Ornes / Source: Science News for Students
A black hole isn’t truly a hole.
It’s quite the opposite. A black hole is a place in space containing an enormous amount of mass packed very tightly together. And it has the capacity to draw in more mass all the time. These objects have so much mass — and therefore gravity — that nothing can escape them, not even light. That makes them some of the most extreme objects in the universe.And they aren’t just massive, but also dense. Density is a measure of how tightly mass is packed into a space. Imagine a black hole the size of New York City. It would have as much mass and gravity as our sun.
Most black holes form after a giant star, one at least 10 times as massive as our sun, runs out of fuel…
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