Submitted 1 month ago by onlinepersona@programming.dev to astronomy@mander.xyz
Black holes the size of an atom that contain the mass of an asteroid may fly through the inner solar system about once a decade, scientists say. Theoretically created just after the big bang, these examples of so-called primordial black holes could explain the missing dark matter thought to dominate our universe. And if they sneak by the moon or Mars, scientists should be able to detect them, a new study shows.
I thought these were disproved by lack of gravitational microlensing?
The main way you’d see that kind of microlensing is if they aggregated.
But given the way gravity works, they should aggregate, otherwise why call them black holes?
If they were relatively evenly distributed would that counteract lensing?
Cool, one more thing to keep me up at night
And one more… www.williamflew.com/blue.html
What would happen if one of these tiny black holes hit Earth? The article doesn’t really talk about it.
Absolutely nothing.
Also not sure why they wouldn’t evaporate nearly instantaneously. Sounds to me like more dark matter bunk.
Passing near the earth, we’d get some strange tides. Passing through the earth, it would eat earth.
The book, Seven Eves is about one of these hitting the moon.
The book Earth by David Brin is about one of these hitting the Earth
Would a regular asteroid be able to wobble the earth as described in this article? Or is it just black holes that should do so?
I seem to remember reading that primordial black holes weren’t yet a proven phenomenon and I have trouble imagining them myself. Wouldn’t they have hawking radiation too?
What if dark matter is some form of black hole or exotic ultra dense material made entirely out of the missing antimatter, which for whatever reason doesn’t otherwise interact with electromagnetism? 2 birds, 1 stone.
superkret@feddit.org 1 month ago
In case this doesn’t tell you a lot, 10^17^g is half the weight of Mount Everest, and 10^23^g is 4x the weight of the Antarctic ice shield.
halfapage@lemmy.world 1 month ago
floofloof@lemmy.ca 1 month ago
I can only do Olympic swimming pools or bananas.
remotelove@lemmy.ca 1 month ago
The earth is estimated to “weigh” 13,170,000,000,000,000,000,000,000 pounds. (That is weird when you think about it. The weight of the earth being based on what something weighs on earth, I mean.)
Mt. Everest is only about 357,000,000,000,000 pounds and is just a tiny fraction of the mass of the earth.
So. My point is that we need a better way to portray scale of things in the universe. AUs work to a point but then we have to quickly move to parsecs. Parsecs quickly give way to light years. Light years kinda work, but only for between 14-26 billion years. Even after all of that, I can hardly still fathom the size of Mt. Everest. (This was a rant, but not an angry rant.)
floofloof@lemmy.ca 1 month ago
Well, for a start, God uses the metric system.
barsquid@lemmy.world 1 month ago
I cannot fathom the size of anything on an astronomical scale. I have seen the videos that zoom out and show Earth at scale with the Sun and then the Sun at scale with other stars. No matter how many times I view the facts it will be incomprehensibly large.
chonglibloodsport@lemmy.world 1 month ago
Weight in pounds isn’t the right unit here. Weight varies depending on the strength of the gravitational field you’re in, whereas mass does not. A kilogram here on earth weighs 2.2lbs but on the moon it only weighs 0.36lbs.