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Close Enough

In Black Holes by Brian Koberlein

To make a black hole, do we have to squeeze mass all the way to its limit, or do we just have to get close enough?

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Black Holes With A Twist

In Black Holes by Brian Koberlein

If you were to spin a ball, for example, the texture of the ball’s surface would make it easy to see the ball is rotating. But what if the ball were perfectly smooth?

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Edge Effect

In Black Holes by Brian Koberlein

While there is lots of evidence showing black holes exist, we’d really like to observe them more directly.

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How Close Is Too Close?

In Black Holes by Brian Koberlein

What would happen if two black holes merged near our solar system? While the real answer is complex, we can do a back of the envelope calculation.