Submitted by taracus t3_ygfptx in askscience
Aseyhe t1_iucns8k wrote
Reply to comment by enmacdee in Is dark matter orbiting galaxies with the same speed as normal matter? by taracus
You can make almost anything a black hole if you compress it small enough. If you compressed the earth down to about a centimeter, it would become a black hole. For a 10^20 gram asteroid, the relevant size is under a nanometer.
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