4 ms·

Kind of chilling to think about these tiny black holes. If they have enough gravitational pull to destabilize a white dwarf, I don't want to know what they'd do

Kind of chilling to think about these tiny black holes. If they have enough gravitational pull to destabilize a white dwarf, I don't want to know what they'd do to our solar system.

ttul 2mo ago
These supernova-generating black holes are atomic scale (Schwartzchild radius of 15pm to 15nm), yet they carry the momentum of a large asteroid. If one of these hit the earth, they would cause a life-ending apocalypse like the event that ended the dinosaurs. The fact that this has not happened yet is encouraging.
- YetAnotherNick 2mo ago
  The drag is insufficient to stop it and it would go right through the earth without stopping. It would cause earthquake of 4 magnitude, which is barely detectable. [1]: https://arxiv.org/pdf/1203.3806 https://arxiv.org/pdf/1203.3806
- shagie 2mo ago
  Can one detect passage of small black hole through the Earth? - https://arxiv.org/abs/0710.3438v1 https://arxiv.org/abs/0710.3438v1 A physics stack exchange answer about it: https://physics.stackexchange.com/a/55184 https://physics.stackexchange.com/a/55184 The most relevant part: > The total energy created by a PBH roughly equals the energy produced by the detonation of one tonne of TNT, but this energy is the total energy it deposits along its path through the Earths diameter, not the energy it produces on impact. So don’t expect a magnificent explosion, we’d be lucky to see a spark as it hits the ground.
  - ttul 2mo ago
    Always the bringer of facts to rain on my factless fun. Thank you.
    - shagie 2mo ago
      And in remembering another paper... it wasn't about a black hole but rather quark matter... Two Seismic Events with the Properties for the Passage of Strange Quark Matter Through the Earth - http://www.geology.smu.edu/~dpa-www/sqm/pdf/sqm_lanl.pdf http://www.geology.smu.edu/~dpa-www/sqm/pdf/sqm_lanl.pdf It looks at pairs of seismic events that trace line through the earth and are timed correctly. > Two sets of reports were found in the 1993 database that fit all the criteria for a linear source. The model and residuals (observed minus predicted arrival times) for the first event are given in Table 1. The RMS residual is 0.73 sec. This RMS value would indicate a good fit for a well-located earthquake. A BBC article about the paper: http://news.bbc.co.uk/2/hi/science/nature/2502755.stm http://news.bbc.co.uk/2/hi/science/nature/2502755.stm
- cyberax 2mo ago
  Not really? They would likely pass through Earth completely invisibly.
- choboswaggings 2mo ago
  Not sure if I share the encouraging nature of this thought! I assume they are also impossible to detect for us before impact.
ungovernableCat 2mo ago
PBH (if they exist) are microscopic in size. If they're real and qualify as a potential dark matter candidate they have passed our solar system many times with the only thing happening being undetectable gravitational tugs.
- deleted 2mo ago
  [deleted]
- shagie 2mo ago
  Not quite so undetectable... in theory. PBS Spacetime - How Many Black Holes Are In The Solar System? https://youtu.be/wh75ubECL8I https://youtu.be/wh75ubECL8I And then How to spot tiny black holes that might pass through the solar system - https://www.sciencenews.org/article/primordial-black-holes-solar-system https://www.sciencenews.org/article/primordial-black-holes-s... That references two papers: Probing primordial black holes and dark matter clumps in the Solar System with gravimeter and Global Navigation Satellite Systems networks - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.063029 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.0... Close encounters of the primordial kind: A new observable for primordial black holes as dark matter - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.063533 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.0...

Kind of chilling to think about these tiny black holes. If they have enough gravitational pull to destabilize a white dwarf, I don't want to know what they'd do to our solar system.

ttul 2mo ago

These supernova-generating black holes are atomic scale (Schwartzchild radius of 15pm to 15nm), yet they carry the momentum of a large asteroid. If one of these hit the earth, they would cause a life-ending apocalypse like the event that ended the dinosaurs. The fact that this has not happened yet is encouraging.

YetAnotherNick 2mo ago
The drag is insufficient to stop it and it would go right through the earth without stopping. It would cause earthquake of 4 magnitude, which is barely detectable. [1]: https://arxiv.org/pdf/1203.3806 https://arxiv.org/pdf/1203.3806
shagie 2mo ago
Can one detect passage of small black hole through the Earth? - https://arxiv.org/abs/0710.3438v1 https://arxiv.org/abs/0710.3438v1 A physics stack exchange answer about it: https://physics.stackexchange.com/a/55184 https://physics.stackexchange.com/a/55184 The most relevant part: > The total energy created by a PBH roughly equals the energy produced by the detonation of one tonne of TNT, but this energy is the total energy it deposits along its path through the Earths diameter, not the energy it produces on impact. So don’t expect a magnificent explosion, we’d be lucky to see a spark as it hits the ground.
- ttul 2mo ago
  Always the bringer of facts to rain on my factless fun. Thank you.
  - shagie 2mo ago
    And in remembering another paper... it wasn't about a black hole but rather quark matter... Two Seismic Events with the Properties for the Passage of Strange Quark Matter Through the Earth - http://www.geology.smu.edu/~dpa-www/sqm/pdf/sqm_lanl.pdf http://www.geology.smu.edu/~dpa-www/sqm/pdf/sqm_lanl.pdf It looks at pairs of seismic events that trace line through the earth and are timed correctly. > Two sets of reports were found in the 1993 database that fit all the criteria for a linear source. The model and residuals (observed minus predicted arrival times) for the first event are given in Table 1. The RMS residual is 0.73 sec. This RMS value would indicate a good fit for a well-located earthquake. A BBC article about the paper: http://news.bbc.co.uk/2/hi/science/nature/2502755.stm http://news.bbc.co.uk/2/hi/science/nature/2502755.stm
cyberax 2mo ago
Not really? They would likely pass through Earth completely invisibly.
choboswaggings 2mo ago
Not sure if I share the encouraging nature of this thought! I assume they are also impossible to detect for us before impact.

ungovernableCat 2mo ago

PBH (if they exist) are microscopic in size. If they're real and qualify as a potential dark matter candidate they have passed our solar system many times with the only thing happening being undetectable gravitational tugs.

deleted 2mo ago
[deleted]
shagie 2mo ago
Not quite so undetectable... in theory. PBS Spacetime - How Many Black Holes Are In The Solar System? https://youtu.be/wh75ubECL8I https://youtu.be/wh75ubECL8I And then How to spot tiny black holes that might pass through the solar system - https://www.sciencenews.org/article/primordial-black-holes-solar-system https://www.sciencenews.org/article/primordial-black-holes-s... That references two papers: Probing primordial black holes and dark matter clumps in the Solar System with gravimeter and Global Navigation Satellite Systems networks - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.063029 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.0... Close encounters of the primordial kind: A new observable for primordial black holes as dark matter - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.063533 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.0...