Universe itself is a black hole.

Mark Earnest escreveu:
**The gravity of Earth only appears to be bending the straight line of light
from the star. It isn't truly bending it at all. As you can tell when you
are looking at the star.

Being at the endpoint of a path of light, how can you tell it's not bent?

And no, it is not Earth's small gravity which made it bend from the star
until getting here.

**Same thing with motion. The star only appears to be a little off from
where it actually is. But you are seeing it where it actually is.

No, you're seeing the light of a star from, say, 2,000 years ago. It is
way off of its current position in space.

**Hint: seeing is a lot more then simply light hitting the retina.
It involves comprehending.

**iow: your mind processes the stars into their correct positions.


You may ask that to anyone plotting
trajectories of rockets and so forth. Much more evident on larger
scales than everyday human ones, which is what you experience is
telling you...

**Trajectories these days are always curves, not lines.

Exactly what I said. What are you missing?

**Nothing. Why did you bring it up?

I did brought it up precisely to show you that plotting trajectories
will never involve straight lines because it's unreal not to take into
account forces applying on the body.

Straight lines are only straight in a perfect, mathbook, Ptolomaic
universe, not this one.

**There is nothing imperfect about this universe.
It is our observations and understanding of it that are imperfect.

Not mine, yours.

I don't even need to go as far as Einstein complex transforms to show
you that: according to Newton, a body is supposed to maintain its
state of rest or constant velocity if no force is being applied to
it. It's the law of inertia, remember?

"The vis insita, or innate force of matter is a power of resisting, by
which every body, as much as in it lies, endeavors to preserve in its
present state, whether it be of rest, or of moving uniformly forward
in a straight line."

So, in that case, the equation governing the motion of a body is a
simple 1 degree polynomial, resulting indeed in a straigh line graph.
In face of a force applying to a body, either accelerating or
desaccelerating it, the polynomial turns to degree 2, resulting in a
curve.

Sadly a setting in which there are no forces at all applying to a body
is an *idealized setting*: it doesn't correspond to reality, it
simply doesn't exist. Here on Earth there's friction and in space
there's always, always a gravitational pull from some body around, no
matter how weak. The result of motion here is always a polynomial
with degree beyond 1, meaning a curve, however slight it is...

Straight lines are a math abstraction, not a physical property, sorry.

**Get your head out of the books long enough to breathe, sir.
Those books aren't exactly sacred texts, you know.
And if they were, scientists would reject them for that very reason.

what are you even saying, troll? Did you even grasp anything I told you?

forget...

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