Steel/Iron and round planets

[Silva]

Is the spherical of planets taken into account at all with steel and iron? Like if one could see that far, would the blue lines eventually curve if they were powerful enough? 

[Calderis he/him]

I doubt it. The lines are unaffected by gravity, and point in a straight line from a person to an object. So I think they'd point straight towards whatever they detected. Regardless of range. 

[Silva]

So theoretically, if one was strong enough (for lack of better terminology and ignoring that it would be a whole different issue), the lines could wind up affecting things in space?

[+Invocation]

3 hours ago, Silva said:

So theoretically, if one was strong enough (for lack of better terminology and ignoring that it would be a whole different issue), the lines could wind up affecting things in space?

I suppose, but that would require an absurd amount of power.

[+Artemos he/him]

Quote

Oneyespike (paraphrased)

Can a Shardblade interrupt iron or steel lines?

Brandon Sanderson (paraphrased)

*after mulling it over a bit, he was very interested in this question* "It would be theoretically possible, because steel lines manifest themselves on the Spiritual Realm. Also, there are other things that can cut/interfere with steel lines."

source

The blue lines are more of a Spiritual thing. I doubt that they'd bend with gravity and would instead- as Calderis said - just point straight from the Allomancer to the target.

Do you have any good reasons for why they might bend with space-time?

[+Oltux72 he/him]

10 hours ago, Silva said:

So theoretically, if one was strong enough (for lack of better terminology and ignoring that it would be a whole different issue), the lines could wind up affecting things in space?

If you are standing on a terrestial planet, there is a metallic core with a diameter of thousands of kilometers a few thousand kilometers below your feet. You would see one gigantic blue line with enough range.

[king of nowhere]

5 hours ago, Oltux72 said:

If you are standing on a terrestial planet, there is a metallic core with a diameter of thousands of kilometers a few thousand kilometers below your feet. You would see one gigantic blue line with enough range.

True. Not even the lord ruler had that power, though. and the thousands of kilometers of rock in the way certainly make detection harder.