undefined | Better HN

0 pointsSharlin6y ago0 comments

An Earth mass black hole has a Schwarzschild radius of about 9mm. It would devour mostly CMB photons, individual gas molecules, and very rarely small dust particles.

0 comments

BurningFrog6y ago

Thanks for teaching me how tiny it would be. I had no idea!

With the gravity of a whole planet it would still attract a lot of stray matter. I don't know how many collisions that would generate though. Mostly just deflected orbits and captured satellites, I assume.

But surely a lot more than a "regular matter" 9mm pellet.

SharlinOP6y ago

Yes, it would whisk small stuff around, and affect the orbits of Kuiper belt bodies just like the hypothetical Planet Nine is theorized to do. It would give a big kick to any objects that happened to pass very close by, but such encounters would be extremely rare. I don’t think the density of tiny stuff is enough for an accretion disc to form around it, but could be wrong. If one did form, we would probably detect its radiation signature.

j / k navigate · click thread line to collapse

0 comments

BurningFrog6y ago

Thanks for teaching me how tiny it would be. I had no idea!

But surely a lot more than a "regular matter" 9mm pellet.

SharlinOP6y ago

j / k navigate · click thread line to collapse