Tiny black holes may be exploding stars across the Milky Way (sciencedaily.com)

This is one of those headlines where I simultaneously think "cool" and now have a new source of low-grade background anxiety about. It can have a seat next to false vacuum collapse.

The "Great Filter" answer to the Fermi Paradox.

Anyone have guesses about how a transiting primordial black hole would effect a Sun like star? Paper is about tidal forces inducing supernova in white dwarfs. For that matter how might it effect sea tides?

Wouldn't Type Ia supernovas caused by blackholes have a different brightness? That could mean the entire cosmic ladder needs to be revised, maybe this could resolve the crisis in cosmology..

Could this kind of trigger effect the standard candle application of Type 1a's? For example, if a black hole triggers a type 1a and that perturbs the type 1a light curve in some way (possibly because less mass could be consumed in the explosion than you would get if one was triggered by mass accretion) and the rate of triggering of this kind changed over time as the universe aged and somehow the population of primordial black holes changed, or the distributions of white dwarf candidates and pbhs changed...

3-Body-Problem once again vindicated as the scariest possible explanation for the Fermi Paradox

when will sun be exploaded?

And yet no one does a thing about it.

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.

[flagged]

[flagged]

If I remember correctly, Stephen Hawking had to do some serious math in the 1970s to convince himself a tiny black hole was not hiding in our Sun

I think there's a PBS Space Time on it (of course)

adding: yup! love that show

* https://www.youtube.com/watch?v=Q6kJaMf3Lgo

Sounds like PMH, if they exist, are essentially the Universe’s ultimate cannonball.

No no no ... they're Monoliths from 2001: A Space Odessy, remember when he became one and would go from star to star blowing them up for fun?

I didn't understand how a black hole could pass through a star when I read this. I think of black holes as large. Apparently a primordial black hole can have the mass of an asteroid compressed into a space smaller than a proton. I also thought very small black holes evaporated quickly via Hawking radiation. I was wrong on the scale there too. A PBH with the mass of an asteroid can easily live for longer than the universe has been around. Something about the very very early universe let matter collapse into these things without the normal processes that form stellar sized black holes.