4 ms·

Ehh, read Steven Hawking. Black holes (singularities) are strikingly similar to what we know of the big bang. If we are in a black hole, it could explain the ac

Ehh, read Steven Hawking. Black holes (singularities) are strikingly similar to what we know of the big bang. If we are in a black hole, it could explain the accelerating expansion of the universe.

somat 4y ago
my pet science fiction theory is that passing the event horizon removes half a dimension. so outside the universe you can move freely back and forth in time, but here in the universe it is constrained you can only go forward. when you pass another event horizon one of what we call a physical dimension gets constrained. you can't move toward the wall of the event horizon, that dimension is gone.
- vecter 4y ago
  Dimensions do not disappear after you cross the event horizon. In fact, for very very large black holes, you would most likely notice nothing as you crossed the event horizon (barring there being a huge accretion disk spinning around at a significant fraction of the speed of light and spewing X-rays). That's because it's so far away from the singularity that the gravitational field isn't strong enough yet to meaningfully distort space. But all paths at that point forward lead to the singularity.
  - somat 4y ago
    exactly there is now not only a direction that you cannot go in, you can't detect it is not there any more. the analogy with time still fits. the only way through time is forward toward the singularity but it will take you forever to get there. the best you can do is stop and that would take an infinite amount of energy.
    - vecter 4y ago
      > there is now not only a direction that you cannot go in, you can't detect it is not there any more You can still detect that it's there. You just can't go there. > the only way through time is forward toward the singularity but it will take you forever to get there That is not true. You will reach it in finite time.
pryelluw 4y ago
Which book to start with?

Ehh, read Steven Hawking. Black holes (singularities) are strikingly similar to what we know of the big bang. If we are in a black hole, it could explain the accelerating expansion of the universe.

somat 4y ago

my pet science fiction theory is that passing the event horizon removes half a dimension. so outside the universe you can move freely back and forth in time, but here in the universe it is constrained you can only go forward. when you pass another event horizon one of what we call a physical dimension gets constrained. you can't move toward the wall of the event horizon, that dimension is gone.

vecter 4y ago
Dimensions do not disappear after you cross the event horizon. In fact, for very very large black holes, you would most likely notice nothing as you crossed the event horizon (barring there being a huge accretion disk spinning around at a significant fraction of the speed of light and spewing X-rays). That's because it's so far away from the singularity that the gravitational field isn't strong enough yet to meaningfully distort space. But all paths at that point forward lead to the singularity.
- somat 4y ago
  exactly there is now not only a direction that you cannot go in, you can't detect it is not there any more. the analogy with time still fits. the only way through time is forward toward the singularity but it will take you forever to get there. the best you can do is stop and that would take an infinite amount of energy.
  - vecter 4y ago
    > there is now not only a direction that you cannot go in, you can't detect it is not there any more You can still detect that it's there. You just can't go there. > the only way through time is forward toward the singularity but it will take you forever to get there That is not true. You will reach it in finite time.

pryelluw 4y ago

Which book to start with?