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There are two explanations. First, when a massive star forms a black hole, usually only a small portion of the star's mass actually goes into the black hole. Most of the rest is blasted away in a supernova, enriching the surrounding space with heavier elements.

Second, there are also pair-instability supernovae. Such supernovae occur in extremely massive stars with a very low content of heavier elements, which likely existed in the early universe. Pair-instability supernovae will blow away the entire star, leaving behind no black hole or neutron star remnant.

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What are white holes?

Hypothetical celestial bodies that behave in an opposite manner to black holes and rather than pulling everything in they spit matter out. White holes also have a unstable gravity and collapse and turn into black holes.


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Are black holes invisable?

Yes and no. It is rather hard to explain, because black holes are so dark and black that no living creature can see them, which in a sense makes them invisible, but you can also see where a black hole is because it sucks in light, too, so that would also, in a sense make it visible, but the my main answer would be, no black holes are not invisible.


Is there anything black holes can't suck up?

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Is the universe made of black holes?

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