Скачать или смотреть What if Planet Nine is a Baby Black Hole?

For centuries, astronomers have speculated that the solar system contains undiscovered planets that orbit in the distant, dark reaches of the sun’s realm. From time to time, they have spotted the gravitational effects of unknown bodies, forcing them to look for the culprit. Both Neptune and Pluto came to light in this way.

If Planet Nine is indeed out there, it may be on a part of its orbit that takes it so far away from the sun that we can't observe it with current technology. But even our deepest, most sensitive scans have turned up nothing.

So now, astronomers have proposed an alternative hypothesis: Maybe Planet Nine isn't a planet at all but rather a small black hole.

Small black holes (and "small," here means planet-size) are very interesting to astronomers. All black holes we know of in the universe come from the deaths of massive stars. And because only the most massive stars (no smaller than, say, 10 solar masses) are big enough to form a black hole, they can only leave behind black holes with a minimum mass of around 5 times that of the sun.

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‪@Techinclusive‬

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