MüThyme @ MuThyme @lemmy.world

Physics nerd. Currently studying some quantum gravity adjacent stuff in QFT

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Joined

2 yr. ago

Ifl science was once good, but it's been click baity junk for as long as I can remember now.

This article is pretty pointless, it's not a new observation at all but it doesn't really mean anything. There are a few different reasons we know that the observable universe can't be a black hole.

If you're talking about what I think you are, then yeah I think that's just how it is. Eventually the only things we'll be able to see are the galaxies in our local super cluster (I think, this is technically outside my area) and eventually they'll all combine into a single extremely massive galaxy.

We live in a really unique time where we can detect that the universe is both infinite, and had a beginning. Hell, we live in the only time where we can know that this time is special.

The concept of a static universe died decades ago, so I don't think we'll be getting away from this. I don't really remember what time scale this is on, though if I had to guess it could be somewhere between 100's of billions to 10's of trillions of years.

Oh yeah, that's also a great point, the Hubble horizon!

It turns out there are a few different horizons in cosmology like that, they really do show up everywhere.

The observable universe isn't a black hole, and we're pretty confident of it, people keep making this observation every few years. There are some interesting analogies between our universe and a black hole, but they're mostly just general concepts that occur all over the place.

For example, we can create little analogue black and white holes in optical fibres, they even have the same horizons and similar governing equations, but they're still not black/white holes. You can honestly get the same effect by just being a bad swimmer and getting in a fast moving river.

That also isn't how it works, I'm afraid.

The black hole gets less dense because the so called "event horizon" becomes larger, the space inside doesn't stretch like we see in the universe.

It's a little removed from my area, but as I understand it there are similarities in the maths. The observable universe has a horizon in some sense, but it's not a point if no return like a black hole, so much as a point of "the universe hasn't existed long enough for anything to be able to travel that far yet"

This has a similar effect as a black hole, but it's really just a concept we see in perfectly flat empty space, light taking time to move.

It won't work like that, the expansion we observe has no directional bias. If it were due to some collapse to a well defined point, we'd be able to tell the difference.

Nah, it can't be anything involving a well defined centre. The expansion has to occur evenly in all directions, and that has to be true for all points in space.

Or a vacuum, which imo is better for dusting than any of those purpose made cloths

Again, it's not dividing race at all.

There are two good reasons for putting it in the constitution. One, it stops it being repealed by the opposition who have a history of that sort of thing, thus it won't be limited to the term of a specific government.

Secondly, Australia's history is 100% built on disenfranchisement of our first people. Slavery, being defined as fauna, voting rights younger than a lifetime etc. Our national identity built this problem, our constitution should recognise who this country belongs to, it should recognise who this country has murdered, abducted and generally hated for it's entire history. This definitely belongs in our constitution, colonialism stole Australia and it's only fair to recognise that.

Solving systemic racial injustice is an inherently one sided thing, and that isn't racist or divisive.

What is racist and divisive is allowing the traditional owners of the land to be trapped in perpetual poverty, with significantly shorter lives and with next to no hope of help. Setting up something to address an imbalance like this, to bring actual equality, is not racist.

There's a fairly well known saying "when you're accustomed to privilege, equality feels like oppression." Things aren't getting worse for you, we're just trying to pull other people out of a hole so they can stand beside you.

Nothing.

The no and yes sides to a referendum prepare an informational pamphlet that everyone receives but there's absolutely no requirement that any of it be truthful, so the opposition just openly lied until the whole thing died.

Actual information was obscured, fear mongering was rampant, the voice was harmless at worst, but could have been the spark that changed Australia for the better.

The point is that this would have given them a path toward voicing those sorts of things, directly to the people who can actually do something about it.

It could have been the start to a lot of great change, it was a simple easy thing to do

Generic "USB media players" used to be a big thing back before they were integrated into every TV, I'm fairly sure you can easily find one with a remote still.

It seems like a lot of DVD/bluray players still take USB too, we used to play off of an external HDD and USB thumb drives using our Blu-ray player when I was a kid. You can probably get something really good second hand too.

Oh cool

I'm pretty sure google drive just acts like a syncing tool in the same way as dropbox, so this would still act like a normal swap drive, presumably.

That said, I've only used swap partitions so I'm not sure how it works when you point it at a directory, but I guess it depends how this person set it up.

The best part is that phytoestrogen does next to nothing to humans, you need mammalian estrogen instead. You know where you find lots of that? Cows milk

They aren't only hair, there's a regular tail in there. If not, they wouldn't be able to use it to swat flies away

It's a catalogue of knots

It is in hot climates, my parents lived in the northern part of Australia and I don't remember there being anything but tiles in that house.

When I was 21, and I got the first of my "arthritis."

It's in quotes because years later it was diagnosed as an entirely different (and even more debilitating) disease, but I still effectively have arthritis a lot of the time, I just now also have constant insomnia and fatigue.