4 ms·

I'm not a physicist, so, please take my opinion like you would take the opinion of somebody chatting in the groceries shop queue, but I find the subject fascina

I'm not a physicist, so, please take my opinion like you would take the opinion of somebody chatting in the groceries shop queue, but I find the subject fascinating and I just want to share my crazy theory. At least, I think it would make for good science fiction. I "think" that dark matter observations are the effect of interference between different Everett branches. The smaller is a volume space, the less possible states it has, so gravity in the center of a galaxy would be less that in the borders. The borders of the galaxy are more entropic because more different states are possible, ergo the stars there experience interference with more Everett universes. Gravity being so weak, it would only show its effects in other branches at huge scales. In this "theory", it seems that dark matter effects would be less visible the further away in space (time) we look. No idea if that's the case. Again, I have no idea what I'm talking about, so this is just for fun.

emrah 5y ago
It would be awesome to be able to find people like you in the grocery shopping queue to chat with about topics like this!
- RobertoG 5y ago
  Sadly, chances are we would talk about the weather instead. I bet that none of us want to look crazy.
  - deleted 5y ago
    [deleted]
  - emrah 5y ago
    If/when AR becomes commonplace, with an app that figures out interests based on public data, it could happen
nathias 5y ago
This really is a really good idea (or a start of) for sci-fi.
mclightning 5y ago
Interesting. But then we would see effect of dark matter correlate with the distance of stars. Right? I think observations do not show such correlation between spacetime location of galaxies and dark matter/energy presence.
- RobertoG 5y ago
  Yes, that would be a way of falsifying the theory. No idea what the data says. Dark matter effects should be less or not existing in the early universe.
rossdavidh 5y ago
Wait, what sort of grocery store queues have that conversation?
- AnimalMuppet 5y ago
  Bars near universities are where you find this kind of conversation.
- gremlinsinc 5y ago
  The one's on Titan.
vcxy 5y ago
Have you read Neal Stephenson's "Anathem"? I'm not exactly sure what to say about it in context of your comment for fear of spoilers, but it sounds like you would like it.
- RobertoG 5y ago
  I have read 'Snow Crash', 'The diamond age' and 'Cryptonomicon', but not that one. Thanks for the recommendation.
DavidSJ 5y ago
This seems sort of like saying a house in California should be more entropic than a house in Rhode Island because California's bigger than Rhode Island. But the laws of physics don't care where we've drawn arbitrary lines on our maps, whether they be geographic or galactic.
- RobertoG 5y ago
  But California is more entropic than Rhode Island, because, being bigger, California can be in more states than Rhode Island. In the center of the galaxy a star can be in N positions, in the periphery can be in f(N) positions. The further from the center the more possible positions (maybe the number of positions is related to Newton square law?). Anyway, as I said, just idle speculation for fun.
  - DavidSJ 5y ago
    But California ≠ a house in California, which was my point. How does the universe know it’s supposed to consider the positions on the entire circumference of a galaxy, and not just the “left” edge, or the left edge plus the center, or the right edge plus one quarter of another galaxy’s pinky finger, when deciding how strong gravity should be in the left edge? Only local information should be relevant, otherwise you’re back to assuming the universe respects our arbitrary boundaries.
    - RobertoG 5y ago
      This is just speculation for fun, but OK, I will bite. You have a compressed gas, so, low entropy, then it starts expanding. The area where it started expanding has less possible states that the area around, but just because the area around is bigger, nothing to do with the relative position itself. If the number of states are associated to gravity somehow, then gravity will be bigger the further you go from the center. Because we are brainstorming in creative mode, I will add a bonus: if the number of possible states increase gravity, maybe, the older the universe gets, the bigger is that influence all around, accelerating its expansion. I suppose that I will get my Nobel any day now ;-)
  - 5y ago

emrah 5y ago

It would be awesome to be able to find people like you in the grocery shopping queue to chat with about topics like this!

RobertoG 5y ago
Sadly, chances are we would talk about the weather instead. I bet that none of us want to look crazy.
- deleted 5y ago
  [deleted]
- emrah 5y ago
  If/when AR becomes commonplace, with an app that figures out interests based on public data, it could happen

nathias 5y ago

This really is a really good idea (or a start of) for sci-fi.

mclightning 5y ago

Interesting. But then we would see effect of dark matter correlate with the distance of stars. Right? I think observations do not show such correlation between spacetime location of galaxies and dark matter/energy presence.

RobertoG 5y ago
Yes, that would be a way of falsifying the theory. No idea what the data says. Dark matter effects should be less or not existing in the early universe.

rossdavidh 5y ago

Wait, what sort of grocery store queues have that conversation?

AnimalMuppet 5y ago
Bars near universities are where you find this kind of conversation.
gremlinsinc 5y ago
The one's on Titan.

vcxy 5y ago

Have you read Neal Stephenson's "Anathem"? I'm not exactly sure what to say about it in context of your comment for fear of spoilers, but it sounds like you would like it.

RobertoG 5y ago
I have read 'Snow Crash', 'The diamond age' and 'Cryptonomicon', but not that one. Thanks for the recommendation.

DavidSJ 5y ago

This seems sort of like saying a house in California should be more entropic than a house in Rhode Island because California's bigger than Rhode Island. But the laws of physics don't care where we've drawn arbitrary lines on our maps, whether they be geographic or galactic.

RobertoG 5y ago
But California is more entropic than Rhode Island, because, being bigger, California can be in more states than Rhode Island. In the center of the galaxy a star can be in N positions, in the periphery can be in f(N) positions. The further from the center the more possible positions (maybe the number of positions is related to Newton square law?). Anyway, as I said, just idle speculation for fun.
- DavidSJ 5y ago
  But California ≠ a house in California, which was my point. How does the universe know it’s supposed to consider the positions on the entire circumference of a galaxy, and not just the “left” edge, or the left edge plus the center, or the right edge plus one quarter of another galaxy’s pinky finger, when deciding how strong gravity should be in the left edge? Only local information should be relevant, otherwise you’re back to assuming the universe respects our arbitrary boundaries.
  - RobertoG 5y ago
    This is just speculation for fun, but OK, I will bite. You have a compressed gas, so, low entropy, then it starts expanding. The area where it started expanding has less possible states that the area around, but just because the area around is bigger, nothing to do with the relative position itself. If the number of states are associated to gravity somehow, then gravity will be bigger the further you go from the center. Because we are brainstorming in creative mode, I will add a bonus: if the number of possible states increase gravity, maybe, the older the universe gets, the bigger is that influence all around, accelerating its expansion. I suppose that I will get my Nobel any day now ;-)
- 5y ago