Hacker News Reader

BTW, regarding "standing" in this gravity field...

If there were a structure to stand on, rather than you being in orbit, the force of gravity would be about 160 billion times the force of gravity on Earth (~1,594,000,000,000 m/s^2).

That's for a 10,000,000 Earth mass black hole at 50 km.

View on HN

If Planet 9 were indeed a black hole its significance would surely be that prevalence of lower mass black holes is orders of magnitude more common than currently known.

This particular one may not be practical for energy generation, but it would be obviously worth looking for others of more useable mass.

Why not? There's various approaches to extracting energy from a black hole of any size, and being smaller generally makes things easier.

Reply on news.ycombinator.com