Submission timeline
2007–2026One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.
First comments on top threads
HN comment orderSome potentially interesting uses for it: - definitive sink to send all of our nuclear waste (it would be the /dev/null of the Solar System) - gravitational energy generator (limitless, until we have no more mass to throw in)
there's a 1:1 scale picture of the black hole fig 1: https://arxiv.org/pdf/1909.11090.pdf
This is a very "dense" paper. So: if dark matter is something that annihilates itself, that's a two-particle interaction, so its macroscopic rate scales as density squared ρ². If there's a black hole in the solar system, the dark matter halo immediately surrounding it would be compressed far denser than around a normal object, so it'd have a much brighter annihilation signal. Nothing's known about dark matter annihilation. They speculate, if its cross section is large enough, this annihilation could…
The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.
- Breakout years
- 3
- Total points
- 561
- Total comments
- 675
100+ points or 50+ comments
reference only — not used in Hall rules or ranking
reference only — not used in Hall rules or ranking
Every submission
| Date | Title as submitted | By | Points | Comments |
|---|---|---|---|---|
| 2019-09-26 | What If Planet 9 Is a Primordial Black Hole?First breakout · Best thread | anpat | 285 | 345 |
| 2021-08-13 | What if Planet 9 is a Primordial Black Hole? (2019) | rbanffy | 159 | 153 |
| 2023-09-28 | What if Planet 9 is a Primordial Black Hole? (2019)Latest 20+ point return | nequo | 117 | 177 |