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Dark matter can be captured by celestial objects and accumulate at theircenters, forming a core of dark matter that can collapse to a small black hole,provided that the annihilation rate is small or zero. If the nascent black holeis big enough, it will grow to consume the star or planet. We calculate therate of dark matter accumulation in the Sun and Earth, and use their continuedexistence to place novel constraints on high mass asymmetric dark matterinteractions. We also identify and detail less destructive signatures: anewly-formed black hole can be small enough to evaporate via Hawking radiation,resulting in an anomalous heat flow emanating from Earth, or in a flux ofhigh-energy neutrinos from the Sun observable at IceCube. The latter signatureis entirely new, and we find that it may cover large regions of parameter spacethat are not probed by any other method.

Dark Matter, Destroyer of Worlds: Neutrino, Thermal, and Existential Signatures from Black Holes in the Sun and Earth