Straight Line?

[Eugene]

It is suggested that just as itis not possible to describe the absolute static condition or perfect circle neither can there be accepted the possibility for the absolute straight line. A question arises regarding the theory for space curvature. Do we have any evidence or definitive figure (however minimal) for degree of curvature of the line? Does the curvature of space by its immensity have a 'gravitational' effect upon a so-called straight projection?

Eugene

[Astronomer1302]

No in space I do not believe a straight line is possible. The space curvature won't alow it.

[Astronomer107]

I have a paradox that states mathematically, in the univere, a straight line cannot exist; however, it probably was thought of before me. That's the problem these days... hehe... no room for anymore ideas! A straight line may exist if it leaves the fabric of spacetime, but if it stays within the universe, and the universe curves, then the line will no longer equal 180 degrees, and thus is not a straight line. So, it depends on how you think about it. But as long as the line exists within the universe, it will not be a straight line.

[Eugene]

Is there a formula giving or estimating the effect of space curvature upon a straight line?
Eugene

[Noah]

If, because of the curvature of space, there is no such thing as a straight line, does this also mean that there is no such thing as parallel lines?

Noah

[Eugene]

I would suspect that to be the case. Then there is also the question of parallax lines, as in astroscience, etc.

[Mallory Knox]

I think the concept of a straight line is really more of a theoretical thing. You can't actually make (draw) a line, let alone a straight line.

[Eugene]

Mallory,
I agree...but why do you think that is? Does space have curvature which effects a sort of gravitational force upon straightness; and if so, would that not suggest an aether?
Eugene

"We have nothing not given and nothing given not asked for."

[Mallory Knox]

I'm just saying you can't create a 1-dimensional object inside a 3-dimensional world, there are no lines here. A line is what you tell it to be because you make it up it. Curvature of space can't affect something that doesn't exist.

[Eugene]

Mallory,

If the curvature of space doesn't affect what we call a line, then what does? What physical effect? Do you have a formula for it?

Eugene