this post was submitted on 05 Sep 2023
304 points (96.6% liked)

Technology

59133 readers
2265 users here now

This is a most excellent place for technology news and articles.


Our Rules


  1. Follow the lemmy.world rules.
  2. Only tech related content.
  3. Be excellent to each another!
  4. Mod approved content bots can post up to 10 articles per day.
  5. Threads asking for personal tech support may be deleted.
  6. Politics threads may be removed.
  7. No memes allowed as posts, OK to post as comments.
  8. Only approved bots from the list below, to ask if your bot can be added please contact us.
  9. Check for duplicates before posting, duplicates may be removed

Approved Bots


founded 1 year ago
MODERATORS
 

Black holes keep 'burping up' stars they destroyed years earlier, and astronomers don't know why::Years after ripping stars to shreds, 24 black holes suddenly flared up with radio waves in inexplicable 'burping' bouts. Half of all star-killing black holes may experience the same.

top 50 comments
sorted by: hot top controversial new old
[–] [email protected] 65 points 1 year ago (3 children)

It sounds like the matter isn't coming out of the black hole, but actually the accretion disc that is in the process of being sucked into the black hole so we aren't breaking the event horizon threshold as title suggests

[–] [email protected] 34 points 1 year ago

we aren’t breaking the event horizon threshold as title suggests

It wouldn't be pop-sci if it didn't have a misleading clickbait title!

[–] [email protected] 5 points 1 year ago (1 children)

It couldn't be the actual black hole past the event horizon, right? It would logically seem that inescapable precludes burping or farting matter

[–] [email protected] 10 points 1 year ago* (last edited 1 year ago)

scientist quoted as saying black holes were "shitting [their] guts out" and "blowing megachunks all over the proverbial tile floor of space"

[–] [email protected] 3 points 1 year ago (1 children)

This is my assumption. Clearly the accretion disk isn't the point of no return, or maybe stuff on the inside = past point of no return, stuff on the outside can get flung off?

[–] [email protected] 6 points 1 year ago (1 children)

If I remember correctly the point of no return is called the Event Horizon.

load more comments (1 replies)
[–] [email protected] 32 points 1 year ago (2 children)

Ok so black holes are just teleporters to other dimensions right?!

[–] [email protected] 35 points 1 year ago (4 children)

It's a one way teleporter to a single dimension, because you're entire mass will be a single imperceptible point.

[–] [email protected] 12 points 1 year ago (4 children)

But it's not a single point though, because blackholes with a different mass have different sizes, so it's more like a "maximum density" that can exist in this universe...

[–] [email protected] 9 points 1 year ago (1 children)

It's an oversimplification, but something with the mass of say, a human, will be crushed into a very very very very tiny space. A much smaller space than 0.1mm radius, which would hold Earth's moon's mass of 7.342×10^22 kg.

[–] [email protected] 1 points 1 year ago

Yes... And something with the mass of the universe will crush into a significantly larger (yet comparatively tiny) volume of space... Thus, a black hole is basically the maximum density we can currently comprehend and theorize.

[–] [email protected] 3 points 1 year ago

Size and density have non-standard definitions in this context.

[–] [email protected] 2 points 1 year ago (1 children)

As far as i know the Mass of the black Hole is concentrated in the Center (singularity). But it is surouded by its schwarzschild Radius. Anything that enters it cant escape.

[–] [email protected] 1 points 1 year ago

Well, unless it burps

load more comments (1 replies)
[–] [email protected] 10 points 1 year ago

That's what the current understanding of physics says. But given that there are singularities that come out of the math, all that really means is we don't actually know what happens inside a black hole.

[–] [email protected] 3 points 1 year ago

Kind of like the lump that forms in my chest when I get a phone call

[–] [email protected] 1 points 1 year ago (1 children)

I equate it to a can of spray cheese. Small hole, puffy cheese.

[–] [email protected] 4 points 1 year ago (4 children)

I thought you were making this up, but apparently there actually is "cheese" that comes in a spray bottle.

What the wiki article does not explain, is why.

[–] [email protected] 7 points 1 year ago (1 children)

Some people put it on crackers but when I was growing up we always put it in the bugles chips.

That is also why I always thought people who pretended to have witch nails by wearing bugles were weird, I was always like “why would you put cheese all over your fingers…”.

[–] [email protected] 9 points 1 year ago (2 children)

Maybe it's just because I'm still shocked at the existence of this product, but I don't see why either of those use cases need cheese in a can instead of just cheese.

[–] [email protected] 4 points 1 year ago

Partly it's convenience, but I think the main reason is you can get cheddar and bacon flavored spray cheese.

[–] [email protected] 2 points 1 year ago* (last edited 1 year ago) (2 children)

Real cheese takes a couple seconds to scoop or even slice. The can is as simple as flexing your finger, and an endless stream of “cheese” comes out!

[–] [email protected] 4 points 1 year ago

Dogs are big fans as well.

[–] [email protected] 2 points 1 year ago

They used to take them on dive trips and squirt it in the water and the fish would eat it. Some diver masters would play jokes and squirt it in other divers hair and the fish would start eating at their hair.

[–] [email protected] 3 points 1 year ago (1 children)

EASY CHEEEEESE!

There's a place in Philly that uses it as the cheese for their steak subs.

It's wrong, but they still do for some reason.

[–] [email protected] 3 points 1 year ago

Wrong to whom? It’s the same thing as Cheez Whiz, which is the right cheese.

[–] [email protected] 2 points 1 year ago (1 children)
[–] [email protected] 2 points 1 year ago

Cheese flavoured foam extrusion

[–] [email protected] 2 points 1 year ago (1 children)

Bruh ez cheese on a Ritz or club cracker. If ur brain doesn't go nuts for that u don't have a single taste bud.

[–] [email protected] 1 points 1 year ago (1 children)

I don't know what it tastes like, but it looks like American cheese.

Is the flavour different from say, cheese whiz, a plastic cheese slice, or an unspiced queso?

[–] [email protected] 1 points 1 year ago

It isn't spicy like cheese whiz. Have you ever had the little keebler lunch packs of crackers and cheese? They're like that. Flavor is close to a plastic cheese single I guess so yeah American cheese but the texture is different. If you can ever get a can I highly recommend it just for the fun of it.

[–] [email protected] 7 points 1 year ago

It'll teleport you from the third dimension to the first dimension.

[–] [email protected] 22 points 1 year ago (1 children)

So would it be appropriate to say they are passing gas?

[–] [email protected] 4 points 1 year ago (1 children)
[–] [email protected] 9 points 1 year ago

Based on that username, I feel like you'd be a subject matter expert.

[–] [email protected] 10 points 1 year ago

What if we're currently travelling through one right now and we forgot to turn the oven off

[–] [email protected] 7 points 1 year ago (1 children)

I wonder if it could be caused by other celestial bodies captured in the black hole's orbit. Some new mass approaches the accretion disk and the gravitational pull slingshots some of the disk's matter out.

load more comments (1 replies)
[–] [email protected] 5 points 1 year ago (1 children)

Maybe black holes sometimes momentarily change into white holes? 🤔

[–] [email protected] 1 points 1 year ago (2 children)
[–] [email protected] 4 points 1 year ago (1 children)

The Cat: So, what is it?

Kryten: I've never seen one before - no one has - but I'm guessing it's a white hole.

Rimmer: A white hole?

Kryten: Every action has an equal and opposite reaction. A black hole sucks time and matter out of the Universe; a white hole returns it.

Lister: So, that thing's spewing time...

Lister: [donning his fur-lined hat] ... back into the Universe?

Kryten: Precisely. That's why we're experiencing these curious time phenomena on board.

The Cat: So, what is it?

Kryten: I've never seen one before - no one has - but I'm guessing it's a white hole.

Rimmer: A white hole?

Kryten: Every action has an equal and opposite reaction. A black hole sucks time and matter out of the Universe; a white hole returns it.

Lister: [minus the hat] So, that thing's spewing time...

Lister: [donning his fur-lined hat, again] ... back into the Universe?

Kryten: Precisely. That's why we're experiencing these curious time phenomena on board.

Lister: What time phenomena?

Kryten: Like just then, when time repeated itself.

The Cat: So, what is it?

[Kryten, Rimmer, and Lister stare at Cat]

The Cat: Only joking.

-Red Dwarf

[–] [email protected] 2 points 1 year ago

So what is it?

[–] [email protected] 3 points 1 year ago* (last edited 1 year ago) (1 children)

A white hole is a theorized antithesis to a black hole. While a black hole sucks matter in and destroys it, a white hole seemingly creates new matter and sprays it into the universe.

Afaik, we haven't actually observed one before. It's just a mathematical theory. But black holes used to be nothing more than theory, too.

Edit: I haven't seen Red Dwarf in so long, I didn't realize you were referencing it. 🤣

[–] [email protected] 1 points 1 year ago

So that thing is spewing time back in to the universe?

[–] [email protected] 4 points 1 year ago

Galactic indigestion

load more comments
view more: next ›